So today I encountered a problem: I can't launch my computer as Mac after having been on my Windows 7 partition. I've had my Windows 7 partition for a couple of months and I've never seen this before. I was done gaming and I closed the computer. Then I booted it up normally and it is stuck at the white background with the Apple logo and the loading thing. I've tried updating Windows, opening it with alt and then choosing Mac but it still gets stuck at the Logo. Would really appreciate help, thanks. It is a late 2011 i7.