Hello I have an iMac mid 2010 that i bought around february this year. Yesterday i decided to upgrade the RAM to 12 Gb because of Lion Somehow, it keeps crasching from time to time. Since yesterday - about three or four times. It just hangs and i can't move the mouse or type with my keyboard. The RAM i bought was a couple of Corsair 2x4GB (CMSO8GX3M2A1333C9). If I'm not mistaken - people have had problems with some kind of amount of RAM. Does anyone have any idea what the problem can be?