I had an early 2011 MacBook Pro 13" with 4GB Ram. I recently purchased the Crucial 8GB Kit. Yes, it worked no problem. Yes, it increased my VRAM to 512mb. Yes, my graphics essentially doubled. *Noticed large differences in Diablo 3-Starcraft 2-Team Fortress 2. ^---Out of all the research I did before I purchased the ram, none of it got to the point.