My macbook pro is the latest on the market. (I'm not sure if that makes it a 2012 or 2013) I just opened it today and everything was working fine until I tried to give my hardrive a name and everything froze up. I let it sit for a few minutes but in my panic I shut it off and turned it back on. Now it's stuck at the opening white screen with the little grey apple. How do I fix this?