I have a PowerBook G4; 1.0 GHz; 1 GB RAM; 80GB HD. it currently is running OS X 10.4.11 I would like to upgrade to 10.5 or 10.6 because my Ipad requires 10.5 or higher. Any ideas on how to even find a copy of 10.5 or if I can upgrade my G4 to a pentium processor so 10.6 will work. yes your correct I just purchased a mac for the first time, I have always wanted one but I wanted to start cheap and work my way up. I have always been a Windows guy but recently I have a lot of apple products in my home and thought I could benefit from converting over. Any help is appreciated keeping in mind a limited budget.