XPostFacto is an open source utility for Mac OS 9 that enables the installation of PowerPC versions of Mac OS X up to Mac OS X v10.4 (Tiger), and Darwin on some PowerPC-based Apple Macintosh systems that are not officially supported by Apple. It was released in 2002. [1]
XPostFacto allowed Darwin, OS X, and OS X Server run on unsupported Mac models. The OS X Installer would not run on machines without a G3, G4, G5, or Intel processor by default, but XPostFacto patched the installer to allow it to run. [2] A Mac OS 9 partition must be booted first. XPostFacto then runs in Mac OS 9 using an installation CD to install a version of OS X. [3] [4]
XPostFacto is available for free, but the company offered support for either $10 or $25. [5] [3]
XPostFacto 4.0 works with pre-G3 Macintosh models. [2] Beige box Power Macs as old as upgraded 7300-era machines are supported. [5] Limited support was also available for Performa 6400 and 6500 models. [6]
Engadget gave XPostFacto a negative review for its slowness, stating it "runs like a limp turtle on our old iMac G3." [7]
macOS, originally Mac OS X, previously shortened as OS X, is an operating system developed and marketed by Apple 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.
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