Hi, I'm a new mac owner so sorry if I'm missing something here. When I switch my iMac on I get a bar which takes its time to load. When the bar finishes the iMac shuts down. I can't start in iOS. I ran disk Utilitiy by putting in the iOS disk in. I have tried Repairing disk that has failed. I can't back up through disk utilty as is says out of memory/space. I'm lost what to do next. As I have some data I need off the disk. Is there away that I can drag the only the files I need instead of backing up the whole disk? The only way I can think what to do is to open up my iMac (which I don't really want to do) taking the hdd out. Pluging that into my Pc and taking the files I need of that. Then putting back the hdd in my iMac and doing a format install. Is there and cd which I can put in my iMac that will boot up a Utility that I can backup afew files over a USB hdd?