Hi, I have a MacBook and the specs are in my sig, I recently bought the mini DVI to VGA converter so I could plug my monitor into my MacBook. I plan on selling my current windows machine and replacing it with my MacBook. One of my main concerns well only concern is that I will be leaving the MacBook on for long periods of time. I normally watch movies off my PC and I normally fall asleep with my PC on. This will end up happening with the MacBook very often. I set the power settings to make the MacBoook go to sleep after being inactive for 15 minutes. But I found that there still was some heat generated on my desk. So is it safe to leave the MacBook on for long periods of time like I will be doing. Is there a way to make the MacBook shut down after being inactive for a certain amount of time? Any help will be greatly appreciated .