So i'm a new Mac user, having just bought my Macbook pro in September. Unfortunately i have yet to solve this problem. Basically if my mac idles for 1-2 hours it will restart every time. I have fooled with the energy preferences tirelessly and have both the hard drive and monitor set to NEVER turn off, yet it will still restart every time i leave it idle for an hour or 2. It's really frustrating as i can't download music while away from home. I've searched some google articles but no one has seemed to pinpoint the problem. Any help?