FreeBSD 5.2.1 on Virtual PC 6.1 under Mac OS X 10.2.8. The problem, XFree86 does not work. I think I need to check if I installed all necessarily packages.
Mac OS X is actually base on Darwin, a version of UNIX based on BSD 4.4 Lite, FreeBSD, NetBSD, and the Mach microkernel. And again, UNIX is not Linux.
UserAgent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.6) Gecko/20040206 Firefox/0.8