My Mid-2010 13" MacBook Pro running OS X 10.8.3 has recently started lagging intermittently to the point of almost freezing. It doesn't quite freeze, but lags so bad that it takes a good 8-10 seconds for the Mac to register even a simple click or swipe. I never do any CPU-intensive work, though I did use it for gaming quite a bit in the past on a Bootcamp partition that I've deleted long since. Now the lag shows up even when there's no app running other than Safari (Moom and Dropbox always run in the background). The only way to restore the Mac to normalcy then is to force-restart and even then it sometimes goes right back to lagging. Has anyone else had such issues with lag? Could it have anything to do with a high operating temperature (around 50 degree celsius)? It does heat up quite a bit at times.