How old of an OS are you running? Since my friend who LOVES Macs, hated it when he upgraded the OS, the last time, it went from usable to a snail. He still used the Mac but downgraded the OS to the old version, he now uses a Win8.1 PC to play his games on, it runs a lot faster. And it only a few months newer than the Mac. I believe it the same CPU and similar video card. I had to fix his PC a few months back, his video card died, that's the only reason I know they both have the same CPU, and similar video cards, I told he should upgrade the video card, but he was a cheap skate.