Apple executives insisted that Mac OS X would only run on x86 chips used in Apple-developed hardware. Intel PCs distributed to Apple developers with the x86 version of Mac OS X used a security chip to prevent developers from copying Mac OS to other Intel PCs, according to several reports this week from Mac enthusiast sites.

However, several enterprising hackers have figured out ways to bypass the security chip and run the developer's version of MacOS for x86 on any x86-based PC, according to a posting on the Web page of The OSx86 Project. Posters on that site, as well as other sites within the Mac community, claim to have used the instructions to run Mac OS X on their Intel or AMD PCs, with some posting pictures and videos of x86 PCs booting Mac OS X.

The process requires a copy of Mac OS X version 4 (Tiger), VMware's virtualization software, the PearPC emulator that can run operating systems written for PowerPC on any architecture, Apple's Darwin 8.0.1 software, an x86 processor that supports SSE2 (Streaming SIMD Extensions 2), and two files created by an independent developer that can be downloaded using the BitTorrent file-sharing system.

As of Friday afternoon, detailed instructions were available in a wiki created by The OSx86 Project. Another site had posted instructions for installing Mac OS X without using VMware's software.