I bought my late 2011 MacBook Pro recently, and as a first time Mac user (though I'm a HUGE fan of iPod touch and iPad 2) I'm mostly very happy with it. After playing around with it for a month or so, I thought it would be nice to be able to be able to download using a wifi connection with the display closed. I downloaded a bunch of prefpanes and apps (both online and on the MAS) and they all worked perfectly. However, I eventually decided that I didn't want to risk overheating my display and uninstalled them all. All seemed to go well until I closed the lid. My MacBook Pro simply will not sleep. Sure, I can use + Option + Eject and then close the lid, which is what I've been doing for a few days. But I can't seem to get it back to how it should be (with the automatic sleep/hibernate). I've tried to remove all possible traces of these apps with Onyx, AppCleaner and AppZapper (I re-downloaded all the no-sleep apps I could remember and uninstalled them completely). I've repaired permissions countless times and restarted my MacBook over and over. If you could offer any advice, I'd really appreciate it.