I don't turn off my MacBook Pro very often, and sometimes it just freezes and restarts itself after a few seconds. Its very annoying, especially when I'm working on something. I contacted support a few times and I did everything they said, and recently I started monitoring my memory usage and I noticed that Safari is taking a lot of memory, so I started to restart Safari when I see that its eating up my memory. My MacBook started acting better until just now. While I was waiting for it to restart it self, I saw that the memory levels were ok. So I'm wondering, is there any way I can see the history of Activity Monitor? Or is there any log I can check to see what the error is?