Macpro 2011. 10.7.? 16gb ram 500gb Hi I was using macpro fine at 12pm. 1pm I get home load up and it's stuck on grey screen with apple logo and grey spinning wheel. I get it to spinning globe screen and its was progressing but was not sure what I was even doing. I've not knocked it since and it should be fine? I pressed Opt on start up and it gave me a disc recovery option. Pressed that and it's been loading for 10 minutes with nothing. Also just pressed Opt again and it gave me two drives. My name hard drive and recovery?? Can someone please advise. Thanks.