I have an older PC with 850MHZ AMD Athlon Processor and 768 MB RAM. I built this PC back in 1998. Still runs Windows XP and Suse Linux well. I bought a MACBook last year and love it. I wanted to see if there was any way I could install OSX on my PC. I understand Leopard would need more than 768 MB RAM, but would an earlier version of OSX, if so, where could I get one?