Mac OS X Snow Leopard

Last updated

Mac OS X 10.6 Snow Leopard
Version of the macOS operating system
OSXLeopard.svg
Snow Leopard Desktop.png
Screenshot of Mac OS X Snow Leopard
Developer Apple Inc.
OS family
Source model Closed, with open source components
General
availability 		August 28, 2009;14 years ago (2009-08-28) [2]
Latest release 10.6.8 v1.1 (Build 10K549) / July 25, 2011;12 years ago (2011-07-25) [3]
Update method Apple Software Update
Platforms IA-32, x86-64 [4]
Kernel type Hybrid (XNU)
License Commercial software license and Apple Public Source License (APSL)
Preceded by Mac OS X 10.5 Leopard
Succeeded by OS X Lion
Official website Apple - Mac OS X Snow Leopard - The world's most advanced OS at the Wayback Machine (archived September 29, 2009)
TaglineThe world's most advanced operating system. Finely tuned.
Support status
Historical, unsupported as of February 25, 2014. iTunes is no longer supported as of September 2014 and Safari support is terminated as well, [5] though the last security update happened in September 2013. [6] [7] An update for the Mac App Store on Mac OS X Snow Leopard was released on January 27, 2016. [8] [9]

Mac OS X Snow Leopard (version 10.6) (also referred to as OS X Snow Leopard [10] ) is the seventh major release of macOS, Apple's desktop and server operating system for Macintosh computers.

Contents

Snow Leopard was publicly unveiled on June 8, 2009 at Apple’s Worldwide Developers Conference. On August 28, 2009, it was released worldwide, [2] and was made available for purchase from Apple's website and retail stores at the price of US$29 for a single-user license. As a result of the low price, initial sales of Snow Leopard were significantly higher than that of its predecessors whose price started at US$129. [11] The release of Snow Leopard came nearly two years after the launch of Mac OS X Leopard, the second longest time span between successive Mac OS X releases (the time span between Tiger and Leopard was the longest).

The goals of Snow Leopard were improved performance, greater efficiency and the reduction of its overall memory footprint, unlike previous versions of Mac OS X which focused more on new features. Apple famously marketed Snow Leopard as having "zero new features". [12] Its name signified its goal to be a refinement of the previous OS X version, Leopard. [13] Much of the software in Mac OS X was extensively rewritten for this release in order to take full advantage of modern Macintosh hardware and software technologies (64-bit, Cocoa, etc.). New programming frameworks, such as OpenCL, were created, allowing software developers to use graphics cards in their applications. It was also the first Mac OS release since System 7.1.1 to not support Macs using PowerPC processors, as Apple dropped support for them and focused on Intel-based products. [2] As support for Rosetta was dropped in Mac OS X Lion, Snow Leopard is the last version of Mac OS X that is able to run PowerPC-only applications.

Snow Leopard was succeeded by OS X Lion (version 10.7) on July 20, 2011. [14] For several years, Apple continued to sell Snow Leopard at its online store for the benefit of users that required Snow Leopard in order to upgrade to later versions of OS X. Snow Leopard was the last version of Mac OS X to be distributed primarily through optical disc, as all further releases were mainly distributed through the Mac App Store introduced in the Snow Leopard 10.6.6 update. [15]

Snow Leopard is the last version of Mac OS X that supports the 32-bit Intel Core Solo and Intel Core Duo CPUs. Because of this, Snow Leopard still remained somewhat popular alongside OS X Lion, despite its lack of continued support, [16] mostly because of its ability to run PowerPC-based applications.[ citation needed ]

Snow Leopard is also the last release of Mac OS X to ship with a welcome video at first boot after installation. [17] Reception of Snow Leopard was positive; see the section below.

System requirements

Apple states the following basic Snow Leopard system requirements are:

Additional requirements to use certain features: [18]

Snow Leopard drops support for PowerPC-based Macs (e.g., Power Macs, PowerBooks, iBooks, iMacs (G4 and G5), all eMacs, plus pre-February 2006 Mac Minis and the Power Mac G4 Cube), although PowerPC applications are supported via Rosetta, which is now an optional install. In 2020, two developer previews of Snow Leopard that are universal appeared on the Internet that can be booted on select G4 and G5 Power Macs with modification and patching. [19]

License

Snow Leopard is available as an upgrade for Intel-based Macintosh computers. Single-user licenses and "family pack" licenses for up to five computers are available. For qualifying Mac computers bought after June 8, 2009, Apple offered a discounted price through its "up-to-date" program, provided that customers' orders were faxed or postmarked by December 26, 2009. The standalone retail version of Snow Leopard is marketed as being restricted to users of Mac OS X Leopard, while the recommended upgrade path from Apple for Mac OS X Tiger is through the "Mac Box Set", which includes Mac OS X Snow Leopard and the current versions of iLife and iWork.

There are three licenses available. [20] These licenses differ in their requirements for pre-installed versions of Mac OS X:

If you have purchased an Upgrade for Mac OS X Leopard license, then subject to the terms and conditions of this License, you are granted a limited non-exclusive license to install, use and run one (1) copy of the Apple Software on a single Apple-branded computer as long as that computer has a properly licensed copy of Mac OS X Leopard already installed on it. [21]

A "Family Pack Upgrade for Mac OS X Leopard" license is also mentioned as a subset of the Leopard Upgrade.

Subject to the terms and conditions of this License ... you are granted a limited non-exclusive license to install, use and run one (1) copy of the Apple Software on a single Apple-branded computer at a time. [21]

It is not entirely clear which license is offered with the retail version of Snow Leopard. As noted above, Apple's website advertised this version as an "upgrade from Mac OS X Leopard for $29" and suggest that others upgrade using the Mac Box Set, implying the stand-alone retail version to be a "Leopard Upgrade" license. On the other hand, some Apple press materials appear to indicate that this version is, in fact, the "Single Use" license:

The Snow Leopard single user license will be available for a suggested retail price of $29 (US) [22] (emphasis added)

However, even if the retail edition of Snow Leopard is in fact a "Leopard Upgrade", the company has acknowledged that there is no technical barrier in that edition preventing a direct upgrade from Mac OS X "Tiger". [23]

The Leopard Upgrade license explicitly applies to the Up-To-Date Program [24] (US$9.95) for Macs bought between June 8 and December 26, 2009 [25] and the installation discs provided through this program are clearly marked as upgrades unlike either of the retail editions.

New or changed features

Mac OS X Snow Leopard is a release that refined the existing feature set, expanded the technological capabilities of the operating system, and improved application efficiency.[ neutrality is disputed ] Many of the changes involve how the system works in the background and are not intended to be seen by the user. For example, the Finder application was completely rewritten in the Cocoa application programming interface, from its previous Carbon codebase. [26] Despite significant changes in the software, users will experience almost no changes in the user interface. Snow Leopard includes the following changes:

Refinements to the user interface

While the Finder was completely rewritten in Cocoa, it did not receive a major user interface overhaul. Instead, the interface has been modified in several areas to promote ease of use. These changes include:

New wallpapers

As with most upgrades of Mac OS X, new wallpapers are available. There are new wallpapers in the Nature (two of which are of snow leopards), Plants and Black and White sub-folders under the Apple folder. Furthermore, there are new Apple wallpaper sub-folders with multiple wallpapers:

New solid colors can be used as wallpapers as well. There is a new blue and gray, as well as a solid kelp which serves as the "green wallpaper." The default "space nebula" wallpaper has been updated as well.

Removed features

Developer technologies

64-bit architecture

Mac OS X Tiger added limited support for 64-bit applications on machines with 64-bit processors; Leopard extended the support for 64-bit applications to include applications using most of Mac OS X's libraries and frameworks.

In Snow Leopard, most built-in applications have been rebuilt to use the 64-bit x86-64 architecture (excluding iTunes, Front Row, Grapher and DVD Player applications). [42] They will run in 32-bit mode on machines with 32-bit processors, and in 64-bit mode on machines with 64-bit processors.

In addition, the Mac OS X kernel has been rebuilt to run in 64-bit mode on some machines. On those machines, Snow Leopard supports up to 16 terabytes of RAM. Newer Xserve and Mac Pro machines will run a 64-bit kernel by default; newer iMac and MacBook Pro machines can run a 64-bit kernel, but will not do so by default. [43] Users wishing to use the 64-bit kernel on those machines must hold down the numbers 6 and 4 on the keyboard while booting to get the 64-bit kernel to load. [44] [45] A change to the com.apple.Boot.plist will also enable users with compatible computers to permanently boot into 64-bit for those wishing to do so.

Stuart Harris, software product marketing manager at Apple Australia, said, "For the most part, everything that they experience on the Mac, from the 64-bit point of view, the applications, the operating system, is all going to be 64-bit, but that at this stage there were very few things, such as device drivers, that required 64-bit mode at the kernel level". [45]

With Mac OS X Snow Leopard only the following Apple computers run or are capable of running the 64-bit kernel: [46]

ProductModel identifierK64 status on client versionK64 status on server version
Xserve early 2008 and laterXserve2,1 and higherCapableDefault
Mac Pro early 2008MacPro3,1
Mac Pro early 2009MacPro4,1
Mac Pro mid-2010MacPro5,1
MacBook Pro early 2008MacBookPro4,1Capable
MacBook Pro late 2008MacBookPro4,1 and 5,1
MacBook Pro early 2009MacBookPro5,2
MacBook Pro mid-2009MacBookPro5,3 and 5,4 and 5,5
MacBook Pro mid-2010MacBookPro6,1 and 6,2 and 7,1
MacBook Pro early 2011MacBookPro8,1 and 8,2 and 8,3Default
iMac early 2006 and later[ citation needed ]iMac4,1 and higherCapableCapable
Mac Mini mid-2010Macmini4,1Default
Mac Mini mid-2011Macmini5,1Capable [47]

^* Amit Singh has reported that the early 2009 Mac Mini and MacBook may be capable of running the 64-bit kernel; however, Apple has set these models to boot into the 32-bit kernel. With some tweaking, the Unibody MacBook can be set to boot the 64-bit kernel. [48]

Grand Central Dispatch

Grand Central Dispatch (GCD) uses the multiple processor cores now in every new Macintosh for more efficient performance. Due to the complexity of multithreaded programming and technical difficulties traditionally involved in making applications optimized for multicore CPUs, the majority of computer applications do not effectively use multiple processor cores. [49] As a result, additional processing power, compared to single-core machines, often goes unused. Grand Central Dispatch includes APIs to help programmers efficiently use these cores for parallel programming.

Grand Central Dispatch abstracts the notion of threads away, and instead provides developers with the concept of queues—lists of jobs (blocks of code) that need to be executed. GCD takes the responsibility of distributing the jobs among actual threads and cores, and clearing up unused memory created by inactive or old threads to achieve maximum performance. Apple is also releasing APIs for Grand Central Dispatch for developers to use in their applications and also to analyze specific blocks of code running on Grand Central Dispatch. [50]

A new C and Objective-C language feature named "Blocks" facilitates creation of code that will easily optimize to take advantage of Grand Central Dispatch. [51] [52] [53]

OpenCL

OpenCL (Open Computing Language) addresses the power of graphics processing units (GPUs) to leverage them in any application, and not just for graphics-intensive applications like 3D games. OpenCL automatically optimizes for the kind of graphics processor in the Mac, adjusting itself to the available processing power. OpenCL provides consistent numeric precision and accuracy, fixing a problem that has hampered GPU-based programming in the past. [54]

OpenCL includes a C-based programming language with a structure that is already familiar to Mac OS X programmers, who can use Xcode developer tools to adapt their programs to work with OpenCL. Only the most process intensive parts of the application need to be written in OpenCL C without affecting the rest of the code. OpenCL is an open standard that has been supported by AMD, Intel, and Nvidia; it is maintained by Khronos Group. [30]

It serves a similar purpose to Nvidia's C for CUDA and Microsoft's Direct3D 11 compute shaders.

It only works with the following Mac GPUs: NVIDIA GeForce 320M, GT 330M, 9400M, 9600M GT, 8600M GT, GT 120, GT 130, GTX 285, 8800 GT, 8800 GS, Quadro FX 4800, FX 5600 and ATI Radeon HD 4670, HD 4850, HD 4870, HD 5670, HD 5750, HD 5770, HD 5870, HD 6490M, HD 6750M, HD 6770M, HD 6970M. [18] If the system does not possess one of these compatible GPUs, OpenCL code will instead execute on the system's CPU. [55]

CUPS

CUPS (the printing system used in many Unix-like operating systems) has been updated to version 1.4 which provides improved driver, networking, and Kerberos support along with performance improvements. CUPS 1.4 is also the first implementation of the Internet Printing Protocol version 2.1. [56]

Power management

Power management has been improved, with implementation of a new wake on demand feature supported on more recent Macintosh hardware. [57] Wake on demand takes advantage of the sleep proxy service implemented in AirPort and Time Capsule routers, [58] so that the computer can sleep while the router responds to mDNS queries. Should the request require the host computer to wake up, the router sends the necessary special wake-up-packet [59] to the sleeping computer.

Security

Apple strengthened Mac OS X by implementing stack protection, and sandboxing more Mac OS X components such as the H.264 decoder in QuickTime and browser plug-ins as a separate process in Safari. [60] Secure virtual memory was an option in earlier releases on Snow Leopard, but the checkbox to disable it was removed later. An anti-malware feature was also added to the system that alerts the user if malware is detected. [61] Mac OS X 10.6.8 added regular malware definition updates. [62]

Computer security researcher Charlie Miller claims that OS X Snow Leopard is more vulnerable to attack than Microsoft Windows for lacking full address space layout randomization (ASLR) since Mac OS X Leopard, [63] a technology that Microsoft started implementing in Windows Vista. [64]

The Safari web browser has received updates to version 6.0 in Lion and Mountain Lion, but not in Snow Leopard. [65]

Compatibility

Snow Leopard breaks compatibility with several older versions of some applications, such as Parallels Desktop 3.0, versions of Aperture before 2.1.1, and versions of Keynote before 2.0.2, among other software. [66] Apple has also published a list of applications with known compatibility issues with Snow Leopard. [67]

Printer and scanner drivers used by previous versions of Mac OS X are not compatible with Snow Leopard and will be replaced during Snow Leopard installation. Since the initial release of Snow Leopard many manufacturers have provided compatible drivers that are available via Software Update. [68] If a native driver is not available Snow Leopard also includes CUPS and Gutenprint open source drivers that may provide limited functionality.

10.6.0 introduced a bug that frequently prevented DNS queries from returning IPv6 addresses. [69] [70] [71] This was resolved in 10.6.8. [72]

Reception

At the WWDC in 2009, Apple stated that Snow Leopard features no new major visual changes. [73] Instead, the release focuses on refining the operating system to enable better performance. [73]

OSNews reported that Mac OS X Snow Leopard was well received by critics. [74] [75]

Engadget reviewed Snow Leopard and pointed out that the price of Snow Leopard dropped from the $129 Apple charged for previous versions of Mac OS X to $29. Engadget's opinion was that this could be largely because most users would not see a noticeable change in the look and feel of the system. [76] However, most reviews commented on the large improvement in speed of the native Mac OS X applications Finder, iCal, Mail, etc. [76]

CNET editors gave it 4 stars out of 5, stating "Intel Mac users will like Snow Leopard's smartly designed interface enhancements, and its Exchange support is a must-have (especially with Outlook for Mac on the way). With a ton of technological improvements, Snow Leopard is worth the $29 upgrade fee." [77]

On October 21, 2009, SFGate blogger Yobie Benjamin wrote that the "MacBook Pro that came preloaded with Snow Leopard kicks butt and is a screaming fast machine", but "when I tried to upgrade one of my 'older' MacBooks, it was a fricking disaster from hell". Apart from upgrading, Benjamin also tried a clean install. But he complained of slowness even after his clean install. He wrote, "I ended up downgrading back to OSX 10.5.8" then he concluded by writing, "I might try to do it again but it won't be till Apple releases at least 2 major fix updates. If you want to roll the dice and try, go ahead... your upgrade might work, however, random installs not working is not good for me. Lesson learned --- I'll wait." [78]

The single-user upgrade and Family Pack units of Snow Leopard ranked 1 and 2 respectively on Amazon.com's software bestseller charts when Apple announced it would release it within the week. [79]

Testmac.com highlighted other unexpected improvements including the release of a new version of Boot Camp, version 3.0, a cleaner, popup software update process and screen and video recording in the new QuickTime Player. [80]

The BBC reported that a bug in Mac OS X versions 10.6.0 and 10.6.1 which, in rare cases, caused loss of user account data after use of a previously existing guest account by users who had upgraded from a previous version of Mac OS X, received wide publicity. [81] The bug was fixed as of version 10.6.2. [82]

Release history

Former Apple CEO Steve Jobs announced Snow Leopard at WWDC on June 9, 2008, [83] and it was privately demonstrated to developers by Senior Vice President of Software Engineering Bertrand Serlet. On Monday, May 11, 2009, after build 10A354, Apple issued a code freeze on Snow Leopard's APIs. [84] The first public demonstration was given at WWDC 2009 by Serlet and Vice President of Mac OS Engineering, Craig Federighi. [83] [85]

VersionBuild [86] Date Darwin versionNotesDownload
10.610A432August 28, 200910.0Original retail DVD release—
10A433Server edition; Original retail DVD release
10.6.110B504September 10, 200910.1About the Mac OS X v10.6.1 Update Mac OS X v10.6.1 Update
10.6.210C540November 9, 200910.2About the Mac OS X v10.6.2 Update Mac OS X v10.6.2 Update

Mac OS X v10.6.2 Combo Update

10.6.310D573March 29, 201010.3About the Mac OS X v10.6.3 Update Mac OS X v10.6.3 Update
10D575April 1, 2010Second retail DVD release—
10D578April 13, 2010About the Mac OS X v10.6.3 Update; v1.1 Mac OS X v10.6.3 v1.1 Update (Combo)
10.6.410F569June 15, 201010.4About the Mac OS X v10.6.4 Update Mac OS X v10.6.4 Update

Mac OS X v10.6.4 Update (Combo)

10.6.510H574November 10, 201010.5About the Mac OS X v10.6.5 Update Mac OS X v10.6.5 Update

Mac OS X v10.6.5 Update (Combo)

10.6.610J567January 6, 201110.6About the Mac OS X v10.6.6 Update Mac OS X v10.6.6 Update

Mac OS X v10.6.6 Update (Combo)

10.6.710J869March 21, 201110.7About the Mac OS X v10.6.7 Update Mac OS X v10.6.7 Update

Mac OS X v10.6.7 Update (Combo)

10J3250For the early 2011 Macbook Pro Mac OS X v10.6.7 Update for early 2011 MacBook Pro
10J4138May 4, 2011For the early 2011 Macbook Pro MacBook Pro Software Update 1.4
10.6.810K540June 23, 201110.8About the Mac OS X v10.6.8 UpdateMac OS X v10.6.8 Update (Combo)
10K549July 25, 2011About the Mac OS X v10.6.8 Update; v1.1 Mac OS X v10.6.8 Update v.1.1

Mac OS X v10.6.8 v1.1 Update (Combo)

Mac OS X Server includes these features and other server-related features. Apple initially stated that Server would include ZFS support, but mention of this feature later disappeared from Apple's website and it was not included in the final release due to licensing issues. [87]

On January 27, 2016, Apple released an update for the Mac App Store on Mac OS X 10.6. The update was titled "Mac App Store Update for OS X Snow Leopard". The download was 3.5 MB. [8] [88]

See also

Related Research Articles

macOS Operating system for Apple computers

macOS, originally Mac OS X, previously shortened as OS X, is an operating system developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac computers. Within the market of desktop and laptop computers, it is the second most widely used desktop OS, after Microsoft Windows and ahead of all Linux distributions, including ChromeOS.

QuickTime is a discontinued extensible multimedia architecture created by Apple, which supports playing, streaming, encoding, and transcoding a variety of digital media formats. The term QuickTime also refers to the QuickTime Player front-end media player application, which is built-into macOS, and was formerly available for Windows.

<span class="mw-page-title-main">Mac OS X Server</span> Server software for macOS

Mac OS X Server is a series of discontinued Unix-like server operating systems developed by Apple Inc. based on macOS. It provided server functionality and system administration tools, and tools to manage both macOS-based computers and iOS-based devices, network services such as a mail transfer agent, AFP and SMB servers, an LDAP server, and a domain name server, as well as server applications including a Web server, database, and calendar server.

Darwin is the core Unix operating system of macOS, iOS, watchOS, tvOS, iPadOS, visionOS, and bridgeOS. It previously existed as an independent open-source operating system, first released by Apple Inc. in 2000. It is composed of code derived from NeXTSTEP, FreeBSD, other BSD operating systems, Mach, and other free software projects' code, as well as code developed by Apple.

The history of macOS, Apple's current Mac operating system formerly named Mac OS X until 2011 and then OS X until 2016, began with the company's project to replace its "classic" Mac OS. That system, up to and including its final release Mac OS 9, was a direct descendant of the operating system Apple had used in its Mac computers since their introduction in 1984. However, the current macOS is a UNIX operating system built on technology that had been developed at NeXT from the 1980s until Apple purchased the company in early 1997.

<span class="mw-page-title-main">XNU</span> Computer operating system kernel

XNU is the computer operating system (OS) kernel developed at Apple Inc. since December 1996 for use in the Mac OS X operating system and released as free and open-source software as part of the Darwin OS, which in addition to macOS is also the basis for the Apple TV Software, iOS, iPadOS, watchOS, visionOS, and tvOS OSes.

<span class="mw-page-title-main">Mac OS X Tiger</span> Fifth major release of Mac OS X

Mac OS X Tiger is the 5th major release of macOS, Apple's desktop and server operating system for Mac computers. Tiger was released to the public on April 29, 2005 for US$129.95 as the successor to Mac OS X 10.3 Panther. Included features were a fast searching system called Spotlight, a new version of the Safari web browser, Dashboard, a new 'Unified' theme, and improved support for 64-bit addressing on Power Mac G5s. Mac OS X 10.4 Tiger also had a number of additional features that Microsoft had spent several years struggling to add to Windows with acceptable performance, such as fast file searching and improved graphics processing.

<span class="mw-page-title-main">Grapher</span> Graphing calculator software bundled with macOS

Grapher is a computer program bundled with macOS since version 10.4 that is able to create 2D and 3D graphs from simple and complex equations. It includes a variety of samples ranging from differential equations to 3D-rendered Toroids and Lorenz attractors. It is also capable of dealing with functions and compositions of them. One can edit the appearance of graphs by changing line colors, adding patterns to rendered surfaces, adding comments, and changing the fonts and styles used to display them. Grapher is able to create animations of graphs by changing constants or rotating them in space.

<span class="mw-page-title-main">Mac OS X Leopard</span> Sixth major release of Mac OS X

Mac OS X Leopard is the sixth major release of macOS, Apple's desktop and server operating system for Macintosh computers. Leopard was released on October 26, 2007 as the successor of Mac OS X Tiger, and is available in two editions: a desktop version suitable for personal computers, and a server version, Mac OS X Server. It retailed for $129 for the desktop version and $499 for Server. Leopard was superseded by Mac OS X Snow Leopard in 2009. Mac OS X Leopard is the last version of macOS that supports the PowerPC architecture as its successor, Mac OS X Snow Leopard, functions solely on Intel based Macs.

<span class="mw-page-title-main">Universal binary</span> Apple multi-architecture binary files

The universal binary format is a format for executable files that run natively on either PowerPC or Intel-manufactured IA-32 or Intel 64 or ARM64-based Macintosh computers. The format originated on NeXTStep as "Multi-Architecture Binaries", and the concept is more generally known as a fat binary, as seen on Power Macintosh.

<span class="mw-page-title-main">Unsanity</span>

Unsanity was a macOS shareware software developer founded in May 2000, notable for coining the term "haxie". Unsanity produced Mac utilities that relied on their own Application Enhancer, a utility that modified the system and other applications. Software incompatibility with Mac OS X Leopard, Snow Leopard, and Lion ended Unsanity's offerings.

<span class="mw-page-title-main">Boot Camp (software)</span> Built-in macOS software to natively install Microsoft Windows on a Mac.

Boot Camp Assistant is a multi boot utility included with Apple Inc.'s macOS that assists users in installing Microsoft Windows operating systems on Intel-based Macintosh computers. The utility guides users through non-destructive disk partitioning of their hard disk drive or solid-state drive and installation of Windows device drivers for the Apple hardware. The utility also installs a Windows Control Panel applet for selecting the default boot operating system.

<span class="mw-page-title-main">Parallels Desktop for Mac</span> Virtual machine software

Parallels Desktop for Mac is software providing hardware virtualization for Macintosh computers with Intel processors, and since version 16.5 also for Apple silicon-based Macintosh computers. It is developed by Parallels, since 2018 a subsidiary of Corel.

<span class="mw-page-title-main">Grand Central Dispatch</span> Technology developed by Apple Inc

Grand Central Dispatch, is a technology developed by Apple Inc. to optimize application support for systems with multi-core processors and other symmetric multiprocessing systems. It is an implementation of task parallelism based on the thread pool pattern. The fundamental idea is to move the management of the thread pool out of the hands of the developer, and closer to the operating system. The developer injects "work packages" into the pool oblivious of the pool's architecture. This model improves simplicity, portability and performance.

<span class="mw-page-title-main">OS X Lion</span> Eighth major release of Mac OS X

OS X Lion, also known as Mac OS X Lion, is the eighth major release of macOS, Apple's desktop and server operating system for Mac computers.

<span class="mw-page-title-main">Gatekeeper (macOS)</span> Security feature of macOS

Gatekeeper is a security feature of the macOS operating system by Apple. It enforces code signing and verifies downloaded applications before allowing them to run, thereby reducing the likelihood of inadvertently executing malware. Gatekeeper builds upon File Quarantine, which was introduced in Mac OS X Leopard and expanded in Mac OS X Snow Leopard. The feature originated in version 10.7.3 of Mac OS X Lion as the command-line utility spctl. A graphical user interface was originally added in OS X Mountain Lion (10.8) but was backported to Lion with the 10.7.5 update.

<span class="mw-page-title-main">OS X Mavericks</span> Tenth major release of OS X

OS X Mavericks is the 10th major release of macOS, Apple Inc.'s desktop and server operating system for Macintosh computers. OS X Mavericks was announced on June 10, 2013, at WWDC 2013, and was released on October 22, 2013, worldwide.

<span class="mw-page-title-main">OS X El Capitan</span> Twelfth major release of macOS

OS X El Capitan is the twelfth major release of macOS, Apple Inc.'s desktop and server operating system for Macintosh. It focuses mainly on performance, stability, and security. Following the California location-based naming scheme introduced with OS X Mavericks, El Capitan was named after a rock formation in Yosemite National Park. El Capitan is the final version to be released under the name OS X. OS X El Capitan received far better reviews than Yosemite.

<span class="mw-page-title-main">System Integrity Protection</span> Security feature by Apple

System Integrity Protection is a security feature of Apple's macOS operating system introduced in OS X El Capitan (2015). It comprises a number of mechanisms that are enforced by the kernel. A centerpiece is the protection of system-owned files and directories against modifications by processes without a specific "entitlement", even when executed by the root user or a user with root privileges (sudo).

macOS Catalina 16th major version of the macOS operating system

macOS Catalina is the sixteenth major release of macOS, Apple Inc.'s desktop operating system for Macintosh computers. It is the successor to macOS Mojave and was announced at WWDC 2019 on June 3, 2019 and released to the public on October 7, 2019. Catalina is the first version of macOS to support only 64-bit applications and the first to include Activation Lock. It is also the last version of macOS to have the major version number of 10; its successor, Big Sur, released on November 12, 2020, is version 11. In order to increase web compatibility, Safari, Chromium and Firefox have frozen the OS in the user agent running in subsequent releases of macOS at 10.15.7 Catalina.

References

  1. ↑ "Mac OS X Version 10.6 on Intel-based Macintosh computers". The Open Group. Archived from the original on November 16, 2014. Retrieved December 4, 2014.
  2. 1 2 3 "Apple to Ship Mac OS X Snow Leopard on August 28" (Press release). Apple Inc. August 24, 2008. Archived from the original on December 9, 2019. Retrieved January 11, 2018.
  3. ↑ "Download Mac OS X 10.6.8 Update v.1.1". July 25, 2011. Archived from the original on June 24, 2011. Retrieved June 23, 2011.
  4. ↑ "Mac OS X v10.6 Snow Leopard — Installation and Setup Guide" (PDF). Apple Inc. September 2009. Archived (PDF) from the original on November 27, 2020. Retrieved October 7, 2020.
  5. ↑ "iTunes 11.4 for OS X 10.6". Apple Inc. September 9, 2014. Archived from the original on February 11, 2015. Retrieved July 28, 2019.
  6. ↑ "Security Update 2013-004 (Snow Leopard)". Apple Inc. September 12, 2013. Archived from the original on September 19, 2022. Retrieved July 28, 2019.
  7. ↑ Keizer, Gregg (February 26, 2014). "Apple retires Snow Leopard from support, leaves 1 in 5 Macs vulnerable to attacks". Computerworld . Archived from the original on May 28, 2014. Retrieved July 22, 2017.
  8. 1 2 "Mac App Store Update for OS X Snow Leopard". Apple Inc. January 27, 2016. Archived from the original on September 19, 2022. Retrieved July 28, 2019.
  9. ↑ Cunningham, Andrew (January 27, 2016). "Apple updates Snow Leopard so you can continue to upgrade from Snow Leopard". Ars Technica . Archived from the original on January 7, 2017. Retrieved June 14, 2017.
  10. ↑ "Mac App Store Update for OS X Snow Leopard". Apple Inc. January 27, 2016. Archived from the original on September 19, 2022. Retrieved July 28, 2019.
  11. ↑ "Snow Leopard Leaps Out of the Gate: Sales for Latest Apple OS Far Exceed Prior Launches, According to NPD". NPD Group. September 17, 2009. Archived from the original on March 26, 2010. Retrieved May 7, 2010.
  12. ↑ Siracusa, John (September 1, 2009). "Mac OS X 10.6 Snow Leopard: the Ars Technica review". Ars Technica. Archived from the original on July 13, 2014. Retrieved October 15, 2019.
  13. ↑ "WWDC 2009 Keynote". Macworld. Archived from the original on December 8, 2015. Retrieved December 2, 2015.
  14. ↑ "Mac OS X Lion Available Today From the Mac App Store". Apple.com. Apple Inc. Archived from the original on July 21, 2011. Retrieved July 20, 2011.
  15. ↑ "Upgrade to OS X Mavericks". Apple.com. Apple Inc. Archived from the original on November 5, 2013. Retrieved November 5, 2013. If you're running Leopard and would like to upgrade to OS X Mavericks, first you'll need to upgrade to OS X Snow Leopard. You can purchase OS X Snow Leopard here.
  16. ↑ "The Rise and Fall of Mac OS X Versions, 2009 to 2015". Low End Mac. October 4, 2015. Archived from the original on August 11, 2017. Retrieved August 10, 2017.
  17. ↑ "Booting OS X Lion GM: No Welcome Video, New Introduction to Scrolling". MacRumors. July 2011. Archived from the original on August 4, 2020. Retrieved April 18, 2020.
  18. 1 2 3 Apple Inc. "Mac OS X Snow Leopard: Technical Specs". Apple Inc. Archived from the original on August 31, 2009. Retrieved May 23, 2011.
  19. ↑ "Snow Leopard on unsupported PPC machines". MacRumors. April 21, 2020. Archived from the original on November 15, 2020. Retrieved December 4, 2020.
  20. ↑ "EnglishLicense" (PDF). Archived (PDF) from the original on November 22, 2009. Retrieved February 22, 2010.
  21. 1 2 "Software license agreement for Mac OS X: Single Use, Family Pack and Leopard Upgrade Licenses for use on Apple-branded Systems" (PDF). Apple Inc. Archived (PDF) from the original on September 22, 2010. Retrieved February 1, 2011.
  22. ↑ "Apple Unveils Mac OS X Snow Leopard" (Press release). Apple Inc. June 8, 2009. Archived from the original on August 14, 2021. Retrieved August 14, 2021.
  23. ↑ Walter S. Mossberg (August 26, 2009). "Apple Changes Leopard's Spots". The Wall Street Journal. Archived from the original on August 28, 2009. Retrieved August 27, 2009.
  24. ↑ "Mac OS X Snow Leopard". Apple Inc. 2011. Archived from the original on February 13, 2011. Retrieved February 8, 2011.
  25. ↑ In the Up-To-Date Program terms and conditions, the 'upgrade' language is used: This program entitles the purchaser of a qualifying product purchased between June 8, 2009, and December 26, 2009, to upgrade to Mac OS X v10.6 Snow Leopard. "Mac OS X Snow Leopard Up-to-Date Program". Apple Inc. Archived from the original on August 30, 2009. Retrieved September 4, 2009.
  26. ↑ "AI: 'Snow Leopard' to include rewritten Finder".
  27. ↑ Reisinger, Don (January 6, 2011). "Mac App Store launches on Snow Leopard". CNET. CBS Interactive. Archived from the original on August 10, 2012.
  28. 1 2 "Mac OS X 10.6 Refinements". Apple Inc. Archived from the original on June 11, 2009.
  29. ↑ "Apple — Mac OS X Snow Leopard — Enhancements and Refinements". Archived from the original on June 11, 2009. Multi-Touch gestures in older Mac models. All Mac notebooks with Multi-Touch trackpads now support three- and four-finger gestures.
  30. 1 2 "Mac OS X Snow Leopard". Apple Inc. Archived from the original on July 20, 2008. Retrieved June 11, 2008.
  31. ↑ "Apple – Mac OS X – What is Mac OS X – Safari". Apple. October 22, 2009. Archived from the original on May 21, 2011. Retrieved October 22, 2009.
  32. ↑ "Apple — Mac OS X — Universal Access". Apple Inc. Archived from the original on October 27, 2009. Retrieved October 23, 2009.
  33. ↑ Marsal, Katie (March 5, 2009). "Apple prepping new Snow Leopard, iWeb, ARD updates". Bits. AppleInsider. Archived from the original on April 16, 2009. Retrieved April 13, 2009.
  34. ↑ "New in Snow Leopard: Minimize windows to App icon and Expose". Vnoel.wordpress.com. June 27, 2009. Archived from the original on September 1, 2009. Retrieved August 29, 2009.
  35. ↑ "Mac OS X Snow Leopard — Refining the user experience". Apple Inc. Archived from the original on July 22, 2010. Retrieved December 2, 2009.
  36. ↑ "News — Snow Leopard: 1 GB = 1000 MB". macprime.ch. June 19, 2009. Archived from the original on September 25, 2009. Retrieved August 29, 2009.
  37. ↑ Siracusa, John (August 31, 2009). "Mac OS X 10.6 Snow Leopard: the Ars Technica review". Ars Technica. Archived from the original on December 7, 2010. Retrieved February 8, 2011.
  38. ↑ "Mac OS X v10.6: Mac 101 – Printing". support.apple.com. Apple Inc. April 29, 2010. Archived from the original on August 4, 2010. Retrieved August 21, 2010.
  39. ↑ "Known issues with Adobe After Effects CS4 in Mac OS X 10.6 (Snow Leopard)". Adobe. November 13, 2009. Archived from the original on November 8, 2009. Retrieved November 16, 2009.
  40. ↑ "How to Customize Language Settings for Specific Apps in macOS Catalina". Beebom. December 4, 2019. Archived from the original on October 12, 2020. Retrieved October 10, 2020.
  41. ↑ "Snow Leopard Snubs Document Creator Codes". TidBITS. September 6, 2009. Archived from the original on March 13, 2010. Retrieved March 17, 2010.
  42. ↑ "Mac OS X — New technologies in Snow Leopard". Apple. Archived from the original on November 12, 2009. Retrieved August 29, 2009.
  43. ↑ "Mac OS X Server v10.6: Macs that use the 64-bit kernel". Apple. Archived from the original on August 31, 2009. Retrieved September 6, 2009.
  44. ↑ "Mac OS X Server v10.6: Starting up with the 32-bit or 64-bit kernel". Apple. Archived from the original on August 31, 2009. Retrieved September 6, 2009.
  45. 1 2 Simms, Craig (August 31, 2009). "64-bit Snow Leopard defaults to 32-bit kernel". CNET. Archived from the original on December 28, 2021. Retrieved December 28, 2021.
  46. ↑ Apple Inc. (August 27, 2009). "Mac OS X Server v10.6: Macs that use the 64-bit kernel". Archived from the original on December 5, 2010. Retrieved February 8, 2011. Learn which Macs can use the 64-bit kernel in Mac OS X Server v10.6, and which use it by default.
  47. ↑ "Can I install Snow Leopard on the new Mac Mini".
  48. ↑ "Is Your Machine Good Enough for Snow Leopard K64?". Mac OS X Internals: The Blog. Archived from the original on June 2, 2020. Retrieved February 8, 2011.
  49. ↑ Siracusa, John (August 31, 2009). "Mac OS X 10.6 Snow Leopard: the Ars Technica review". Ars Technica. Archived from the original on December 7, 2010. Retrieved February 8, 2011.
  50. ↑ Markoff, John (June 10, 2008). "Apple in Parallel: Turning the PC World Upside Down?". The New York Times. Archived from the original on January 11, 2011. Retrieved February 8, 2011.
  51. ↑ Lattner, Chris (August 27, 2008). ""Blocks" in Clang (aka closures)". Archived from the original on September 4, 2011.
  52. ↑ Quatermain, Alan (September 1, 2008). "Comment on Article: Cocoa for Scientists (Part XXVII): Getting Closure with Objective-C". MacResearch. Archived from the original on December 1, 2008.
  53. ↑ "Grand Central Dispatch a better way to do multicore" (PDF). Apple Inc. 2009. Archived from the original (PDF) on June 12, 2009.
  54. ↑ OpenCL Taking the graphics processor beyond graphics (PDF), Apple Inc., 2009, archived from the original (PDF) on July 11, 2009
  55. ↑ Siracusa, John (October 31, 2009). "Mac OS X 10.6 Snow Leopard: the Ars Technica review". Ars Technical. Archived from the original on May 9, 2012. Retrieved June 14, 2017., John Siracusa's review of Snow Leopard for Ars Technica.
  56. ↑ Sweet, Michael (January 9, 2009). "IPP/2.1 support now in CUPS 1.4svn!". ipp (Mailing list). Archived from the original on August 15, 2009. Retrieved June 5, 2009.
  57. ↑ Fleishman, Glenn (August 28, 2009). "Wake on Demand lets Snow Leopard sleep with one eye open". Macworld.com. Archived from the original on September 16, 2009. Retrieved September 15, 2009. How it works", "Energy Saver preference pane
  58. ↑ "Mac OS X v10.6: About Wake on Demand (Apple Article HT3774)". Apple. August 27, 2009. Archived from the original on August 31, 2009. Retrieved September 15, 2009. Setting up Wake on Demand", "Setting up a Bonjour Sleep Proxy
  59. ↑ Note: The networking industry nomenclature for a wake-up-packet is Magic Packet
  60. ↑ "Peering Inside Snow Leopard Security" Archived June 8, 2011, at the Wayback Machine , TidBITS Safe Computing, August 27, 2009
  61. ↑ Apple Confirms Anti-Malware Added to 'Snow Leopard'., August 27, 2009, archived from the original on September 1, 2009
  62. ↑ Apple releases Mac OS X update to catch MAC Defender malware, May 31, 2011, archived from the original on May 2, 2013
  63. ↑ "Apple's Snow Leopard Is Less Secure Than Windows, But Safer," Archived June 19, 2013, at the Wayback Machine Wired, September 2, 2009
  64. ↑ "Snow Leopard security – The good, the bad and the missing" Archived September 1, 2009, at the Wayback Machine , The Register, August 29, 2009
  65. ↑ Where are the Safari security updates for Windows and Snow Leopard? Users left exposed, Sophos Naked Security blog, July 30, 2012, archived from the original on August 1, 2012
  66. ↑ Diaz, Jesus (August 28, 2009). "Applications unsupported by Snow Leopard: The Unofficial List". Gizmodo.com. Archived from the original on June 2, 2011. Retrieved June 21, 2011.
  67. ↑ "Mac OS X v10.6: About incompatible software". support.apple.com. Apple Inc. November 25, 2009. Archived from the original on February 1, 2011. Retrieved December 29, 2010.
  68. ↑ "Mac OS X v10.6: Printer and scanner software". Support.apple.com. Archived from the original on July 18, 2011. Retrieved June 21, 2011.
  69. ↑ "Two new bugs reported". Lists.apple.com. February 4, 2010. Archived from the original on July 7, 2011. Retrieved June 21, 2011.
  70. ↑ Iljitsch Van Beijnum (September 29, 2010). "There is no Plan B: why the IPv4-to-IPv6 transition will be ugly". Ars Technica . Archived from the original on May 22, 2011. Retrieved June 21, 2011.
  71. ↑ Iljitsch Van Beijnum (November 11, 2010). "Apple fixes broken IPv6 by breaking it some more". Ars Technica . Archived from the original on May 29, 2011. Retrieved June 21, 2011.
  72. ↑ "10.6.8 seems better". Ipv6-dev (Mailing list). Apple Inc. June 24, 2011. Archived from the original on August 3, 2012. Retrieved April 22, 2013.
  73. 1 2 Siracusa, John (August 31, 2009). "Mac OS X 10.6 Snow Leopard: the Ars Technica review". Ars Technica. Archived from the original on April 22, 2012.
  74. ↑ "Snow Leopard Reviews Positive, Upgrades Tiger Too". Osnews.com. Archived from the original on June 22, 2011. Retrieved June 21, 2011.
  75. ↑ "Review roundup: Apple's Snow Leopard sports subtle improvements". Appleinsider.com. August 27, 2009. Archived from the original on June 11, 2011. Retrieved June 21, 2011.
  76. 1 2 "Review From". Engadget.com. Archived from the original on June 29, 2011. Retrieved June 21, 2011.
  77. ↑ "Snow Leopard Review and Rating from CNET". Reviews.cnet.com. Archived from the original on June 18, 2011. Retrieved June 21, 2011.
  78. ↑ Benjamin, Yobie (October 21, 2009). "Windows 7 is darn good; Apple OS X Snow Leopard is a[sic] upgrade dog". Sfgate.com. Archived from the original on October 31, 2009. Retrieved June 21, 2011.
  79. ↑ Keizer, Gregg (August 24, 2009). "Snow Leopard Pre-Order sales". Computerworld.com. Archived from the original on June 5, 2011. Retrieved June 21, 2011.
  80. ↑ "Review From TestMac.com". Testmac.net. June 26, 2008. Archived from the original on September 19, 2022. Retrieved June 21, 2011.
  81. ↑ "Data losses in Snow Leopard bug". BBC News. October 13, 2009. Archived from the original on July 23, 2017. Retrieved December 31, 2009.
  82. ↑ "Apple releases Mac OS X 10.6.2 with guest account bug fix". Appleinsider.com. November 9, 2009. Archived from the original on June 11, 2011. Retrieved June 21, 2011.
  83. 1 2 "Apple Previews Mac OS X Snow Leopard to Developers" (Press release). Apple Inc. June 9, 2008. Archived from the original on November 1, 2017. Retrieved January 10, 2018.
  84. ↑ Muchmore, Michael (May 15, 2009). "Analyst's View: What to Expect in Apple's Snow Leopard". PC Magazine. Archived from the original on May 21, 2009. Retrieved May 26, 2009.
  85. ↑ Apple Inc. (2009). "Apple – QuickTime – Apple WWDC Keynote Address". Apple Inc. Archived from the original on January 9, 2011. Retrieved December 29, 2010.
  86. ↑ "Mac OS X: About This Mac "build" information". Apple Inc. April 14, 2010. Archived from the original on May 24, 2010. Retrieved April 26, 2010.
  87. ↑ Foresman, Chris (October 26, 2009). "Apple abandons ZFS on Mac OS X project over licensing issues". Ars Technica. Archived from the original on November 14, 2009. Retrieved November 9, 2009.
  88. ↑ Hall, Zac (January 27, 2016). "Apple releases OS X 10.11.4 public beta 2 + rare update for OS X 10.6 Snow Leopard". 9to5Mac. Archived from the original on January 28, 2016. Retrieved January 28, 2016.
Preceded by Mac OS X 10.6 (Snow Leopard)
2009		Succeeded by
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.