It is a iBook G4 12" - M9164LL. It does not have an O/S installed on it. Once again I have used/repaired/done everything with PC's so I'm illiterate when it comes to Mac's. I burnt a Tiger 10.4 OSX iso onto a DVD, but everytime I put it in and turn the computer on and hold "c" it will just eject the disk out. I have read that it should probably have a DVD Rom in it, and even when I looked it up through Apple.com and it confirmed. When I looked my specs up on Apple it did however say Panther was the original O/S. So what recommendations do you have for an O/S to put on it, I'm willing to try any of them (OSX, Linux, or any others you have used on these). Thank you for any help.