Apple sells Mac OS just as they sell Macs.
They don't want ANY other OS running on their stuff. And will make this happen.
That is why BeOS changed to the x86 direction for development a couple of years before the demise of the desktop BeOS and sadly most of the coolest apps in BeOS are x86.
You won't see AOS on a mac.
You could go my route and buy an old Powermac 9500/9600 off ebay (w/ a 604 (no G3)) and run BeOS PPC w/ the nifty Amiga OS theme.
You could also do this with your x86 bit. Go to the
www.frizbe.net hardware matrix and see how compatable your hardware is and just do it x86 style.
BeOS rocks. I haven't been able to get AOS 3.9 running. Stateside hardware is just too damned much.
Maybe a Pegasus? Hum...