Actually, there is a port of the BSD part of OS-X that does run on an x86 box. It's called Darwin, it is Open Source, and you can download it from Apple and install it on a PC. It has NO GUI or any of the other stuff that makes it 'a Mac', it's just the BSD Unix part. It is actually a pretty nice flavor of BSD, I have been told. I believe it's meant mostly for developers. It also makes it nice for people that need complete compatability at the command line level between their Macs and a few PCs.

Obviously it wouldn't be the best choice for Athelind, but it is there....