I am trying to set up my "new" used 2010 Mac Pro 6 core desktop. It came with the "OEM" one TB hard drive in bay 1 which I moved to bay 2 and installed an SSD in bay one. I could't use "migration assistant"as the old machine was running 10.6. I used carbon copy cloner to move everything to the SSD drive. That overwrote the operating system back to 10.6. I reinstalled 10.8 but the problem is when I start up I get the chime but all I get is a gray screen that hangs. It never gets to the Apple. I have to shut down and restart. It boots the 2nd time with no problem. Any Apple genius out there that can help? Any ideas gratefully accepted with many thanks.

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