I just got my Mac this week, and I still have a lot to learn. Yesterday, I was restoring my iPod on the new Mac, and the restore was stuck in the middle of it. I tried getting out of iTunes regularly, but it didnt work. Then I did control+alt+esc to force quit out of it. I tried getting back in and now it says "The iTunes library file is locked, on a locked disk, oryou do not have write permission for this file." What do I do?