I have a Macbook pro 15" mid 2009 and after using apple tv and downloading a movie yesterday I get an error message not enough memory to start up. I reset the pram and rhen reset the actual ram chips and it starts out better but something is grabbing all the memory. When I go to system monitor no one program seems to be causing the problem (under cpu) but when I go to network it show a lot of activity! Help?? any ideas what is causing this to happen. It was okay until after we played the movie???