My MBP is stalling out when trying to load any OSX when I took in to the apple store they said it was the hard drive so I replaced it. It took 2 days to finish loading the os. So I replace the ram went from 4 gig to 8 gig. Today I'm tying to install mountain lion it has been stuck at 12 mins remaining for the last 2 hrs.. When I had the last os loaded I would get a lot of the spinning circle thing. Is there any help for this or is it toast?