Other World Computing Releases XPostFacto 4.0

OS X 10.4 ‘Tiger’ can now roar on ‘Legacy’ Macs no longer supported by Apple

Sep 15, 2005 | Woodstock, IL


If you want to put a Tiger on your computer but Apple doesn’t support your system, Other World Computing can help. With the help of attorney and Mac geek Ryan Rempel, OWC is able to offer XPostFacto, an application that allows users of certain unsupported Macintosh computers to run Mac OS X, OS X Server and Darwin. The latest version, XPostFacto 4.0, expands the support for ‘Legacy’ machines to run the latest OS X release, Apple’s highly acclaimed OS X 10.4 Tiger. “People make a significant investment in their Macs, and we want to them to get the most use from them,” said Larry O’Connor, president of OWC. “Macs last an amazingly long time and XPostFacto helps them go that much longer, even allowing models built 10 years ago to continue to take advantage of Apple’s latest and greatest OS.

A lot of people have some pretty decked-out PowerMac 7300-9600s, and PowerMac G3s – never mind the laptops and iMacs that no longer get Apple support. With XPostFacto, many of these systems can run the latest OS X versions and reap the benefits that Apple’s modern OS X has to offer.”
Here’s what’s new in version 4.0:

  • Supports Mac OS X 10.4 (Tiger)
  • Will install Mac OS X 10.2 through 10.4
  • Runs on Mac OS 9.x or 10.2 through 10.4
  • Works with machines that Apple originally supported in Mac OS X but no longer supports in 10.4 (the original iMac, original iBook, Beige G3, Wallstreet and Lombard PowerBooks)
  • Works with some machines that Apple never supported for Mac OS X, such as the 7300-9600 series (G3 or G4 upgrade required for Mac OS X 10.3 and later)
  • Avoids the misapplication of the 8 Gigabyte limit on "Old World" machines by the Mac OS X Installer

For more details and additional documentation on the utility’s capabilities and limitations, please visit While XPostFacto may be downloaded at no cost, users are encouraged to pay a $25 registration fee to support the continued development of XPostFacto. In addition, registered users are provided additional access to OWC’s OS X tech forum and free notifications of XPostFacto updates and feature releases.


About OWC

Other World Computing (OWC), founded in 1988, is dedicated to helping Mac and PC enthusiasts do more and reach higher. We believe in sustainability – OWC solutions are genuinely built to last, go the distance, and enable users to maximize the technology investment they have already made. OWC's operation provides leadership in business sustainability, with its headquarters among the first in the world awarded LEED Platinum certification. OWC features an award-winning technical support team and an unparalleled library of step-by-step DIY and informational videos. From the home desktop to the enterprise rack, the corporate backup to secure medical data, the recording studio to the motion picture set, and beyond, there should be no compromise. That is why OWC is here.

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Company Contact

Nathan Papadopulos