So activity monitor wouldn't even tell me what was using my CPU (2010, 13" MPB), but yet my computer kept getting hotter and hotter. I tried to close all apps, I tried to log out and change user, eventually I had to do a restart. It was topping out at 80*C with then fan at 4000rpm and NOTHING going on. I have never had this program with my mac before, it's got to be lions fault. And it appeared to start out of nowhere, not even doing intensive stuff. Disappointed.