Ok. I looked everywhere and just can't see a thread for this completely. I have an iMac 10 3 9, PowerPC G4, and I would like to upgrade to Leopard. What would I need to do and is it even possible. I am not too amused so far by what I've come across on the internet that suggests that I can't do this. I bought this computer in 2004, it surely can't already be obsolete? Do I need to go to Tiger, then Leopard. Someone on the Apple forums said you could buy a complete install that would do the trick. I am a novice, so I don't know.