Hi, I have a Macbook Pro (late 2014) with Retina Display & nVidia Graphics card. Whenever I launch a game, the screen gets scrambled for a second before the game launches. It happened with Hitman Absolution and Plague Inc. Do I have to worry about the graphics card? Also, today I was browsing Facebook on safari, and an area of the window got scrambled, I minimised Safari, and that screen area wasn't scrambled, I brought up Safari again and it was scrambled again. When I hovered the mouse over that scrambled area, that area was no longer scrambled, but when I hovered the mouse away it got scrambled again. Then, I refreshed the webpage and that area wasn't scrambled any more. This issue (Safari one) happened today for the first time. From my experience this must be a software glitch either from MAC OS or graphics drivers, but I want to be sure, I am not that much experienced on MAC Computers.