Hi, I have a white macbook with a 500gb HD Momentus XT. Now I bought a macbook pro 15 early 2011 and put the HD in it. Apparently, everything is working. But the O.S. (lion) crashed once, having to restart. Diablo 3 beta is crashing when click start game, after choosing the character. Some Java applications is crashing to sometimes. Do I need to format the drive? I'm waiting a Crucial M4 128gb Sata3 SSD, i will put this with the original 750gb in the optbay.