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Q: Imac shuts down unexpectedly then restarts then shuts down again
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Feb 25, 2015 9:07 AMby norm123,Hi bria90,
That is not good thing to have. Lets see if we can get it to boot up normally. Start with checking out the article below and go over each troubleshooting option that is available to get it back up and running. It will have you check things Safe Boot and resetting the NVRAM.
Mac OS X: Gray screen appears during startup
http://support.apple.com/en-us/HT204325
Take it easy,
-Norm G.
