Our website provided a free download of XPostFacto 4.0 for Mac. The actual developer of this free software for Mac is Ryan Rempel. XPostFacto for Mac is categorized as System Tools.
From the developer:
XPostFacto helps you install and boot Mac OS X, Mac OS X Server, and Darwin on certain unsupported systems. When Mac OS X installs successfully, its stability on unsupported systems appears to be excellent. However, there are cases in which Mac OS X is difficult to install, and there are a variety of problems you can run into. Therefore, XPostFacto lets you install Mac OS X on some earlier machines.
You may want to check out more Mac applications, such as LeopardAssist, which might be similar to XPostFacto.