I have a 24" imac with the dualcore. Yesterday I was pasting something from Illustrator to photoshop and it froze. The ball spun for about 5 mins, force quit would not come up so I held the power button and shut it off. Now only the grey screen comes up like its booting, apple logo and spinning wheel. I started in safe mode and ran fsck but it seemed to take forever (hours) and never finished. Any ideas? Thanks in advance!