Hi new to the forum, I joined because my late 2011 fully specd MacBook Air is not logging in, or letting me reinstall Osx mountain lion. I just got off the phone with AppleCare and they spent 45mins trying to solve it and ended up recommending a trip to the apple store. So I was wondering if you guys had any recommendations, because I would really rather not have to make the trip all the way to the mall.