my screen is changing colors after I tried calibrating it and now won't go back to normal. I have a MacPro, can you tell me if it would be my graphics card gone bad?
My macpro has been working fine, suddenly in the past few weeks, for no reason at all, the screen shifts to be greens, blues and won't keep it's normal coloring, almost looking negative like. Can you tell me if that is a graphic card issue or what might be causing it?
Mac Pro, OS X Mountain Lion (10.8.3)
