1 Reply Latest reply: Mar 31, 2013 5:53 PM by OGELTHORPE
TSR1970 Level 1 Level 1 (0 points)

Hi - My mid-2009 15-inch, 2.53GHz MacBook Pro does not show the Higher Performance option. Why is that? The computer runs VERY slow on graphic apps that used to run much faster!

OS X Mountain Lion (10.8.3)