I'm posting a question because I don't trust the salesguy at my local mac shop; he seemed more interested in selling me a new computer. Basically, I have P-book G3 (meagre 128 RAM) that would need a RAM upgrade to, supposedly, 512 in order to handle OSX. The salesguy warned that this option would still be slow and that I should get a new computer, since the G4 is the minimum processor to run OSX effectively. - Anybody with experience for this --- will the RAM upgrade (from 128 to 512) will be good enough? For me, I just need a computer that's a decent photo warehouse and music library. - Other alternatives? Can you actually do a hardware upgrade to get a new processor chip (G3 to G4)?