How does this work ?

The latest Leopard ISO image comes with PC-EFI built in. This allows normal BIOS based PC’s to boot off the Leopard DVD. You can find more about PC-EFI from the OSX86 wiki.

Ironically, Microsoft Windows support BIOS only, and Apple makes Boot camp to fill the gap. The EFI patch works in a similar approach: it emulates EFI data for normal BIOS-based PCs and let OS X treat them as genuine EFI-based Macs.

The EFI emulation is a long dream in OSX86 community, but prior to this, thanks the Apple’s open source Darwin Project and those Hackintosh gurus, we can still enjoy OS X on normal PCs, with patched kernels/kernel modules which just bypass EFI. Now with the EFI patch, the hackintosh can boot off “vanilla” (unmodified) OS X kernel and use vanilla kexts, which gives a more clean room and great peace of mind for future system updates.

How to Install Leopard on vanilla PC’s

1. First get the EFI patched ISO from some torrent site like Mininova. You can find it by performing a search for iATKOS v1.0i.
2. Then burn the ISO to the DVD.
3. Boot from the DVD, select what you want to install and proceed.

That’s it. You have got a fully functional Mac OS X Leopard on your PC.

P.S. – I am yet to try this method. So I cannot tell whether the Leopard installation plays nice with existing Windows and Linux installs.

Via – Daily Apps Blog