I got my macbook pro retina 2 days ago from an Apple Store, but I'm already having some problems with it. Here are some problems: 1. The fan makes weird consistent 'trrrrr' sound non-stop - this can only be heard when I move my ear close to where the power button is, but it is very annoying. 2. Like I said, I bought this macbook 2 days ago, but it shuts down completely RANDOMLY once a while - it's happened twice now already.. and I've attached a photo showing the message I get: http://imgur.com/W7rEEqm,38rqkCc#0 Are these somewhat acceptably normal? Or do I really have to go for an exchange again..?