Hey guys! Just installed modern warfare 2 on my macbook 15 2011 (HD6490M). I have gfxcardstatus App installed, thats lets me choose which card to use.. with the intel hd 3000, the game works, showing the graphics, but very slow. but if i choose the AMD Hd 6490M - the game is just black screen. sound is there - but no picture... to you have any idea what the issue is? thanks guys! Kasper.