Hello, For the last 6 months my Mac has been a nightmare to use. It keeps randomly finding files to Corrupt - usually a purchased itunes file - music, video, podcast, etc. So every time I go and sync my music library it randomly picks a file to corrupt which ends up stopping the sync. This happens when I try and use Time Machine, backup iPhoto, copy my files to an external drive, etc. It's driving me NUTS! And I've used disc repair as well. And it'll sync one device fine but then decide it's corrupted on another.... It's a NIGHTMARE. It renders my Macbook practically useless if I can't work with my files. I ran disk utility and there's nothing wrong with my HD.