Unfourtunatly. FreeBSD does NOT run on a Macintosh, either G4. G3, PPC, or 68K. It will only run on a i386 (pentium) computer or Alpha. Rather similar to FreeBSD is NetBSD, that is designed to run on almost everycomputer imaginable. It DOES support ALL of the mac processors I talked about up there, goto
http://www.netbsd.org They have a wonderful install guide