I have a iMac 2.8ghz with 2 gb of memory. I am trying to import all my photos, video and music. iPhoto is choking, keeps shutting down and needs to be relaunched. Unfortunately it does not seem to reset (free up the memory) Do I need to just reboot to have that happen? In windows you just have to close the application and that frees up the memory. I am surprised that Apple has not figured this out yet? Thoughts?