This is the first thing I've had go wrong with my Mac since I got it a month ago. Hopefully its an easy fix. For example, in iTunes, I go File>Add to Library... and iTunes completely freezes. I can't play a song. The menu bar (File, Edit, Controls, ect.) goes grey. This happens for other apps too, like Toast. When I do File>Open... the same thing happens. Has this happened to anyone else? How do I fix it?