Well my brother just picked up an old iBook G4 2003 A1055 off ebay. Not having a mac, nor being to computer savvy, he assumed it was broken. When we turned it on it came up with a picture of a folder with the finder icon and flashed to a question mark. After we had a look at it I suspected it didn't have an OS installed. Must have been formatted. To check, I chucked my OSX disk from my computer (I've never used it before as it came per-installed) and it started up. It came up with a message saying Osx couldn't be installed. What OS will this take and what else do I/should I need to know to get this running. All the best for christmas from Australia.