os 10.8.5 shutdown

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Level 1

10 points

os 10.8.5 shutdown

I have a iMac that is running 10.8.5 mountain lion it will occasionally shuts down unexpectedly. Need to unplug wait and the plug back in. Was told by a Genius Bar tech the problem may be with Mountain Lion. To me this seems like a hardware problem not software. The computer owner does not want to upgrade to Yosemite. If the upgrade would definetly fix the problem we would concider it. The ted mentioned a specific problem with power shutdown with Mountain Lion and I did not write it down could some one help?

iMac (27-inch, Late 2012), OS X Mountain Lion (10.8.5)

Posted on Mar 27, 2015 2:48 PM

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Answer 1

rkaufmann87

Level 10

140,550 points

Mar 27, 2015 5:00 PM in response to arancio

If you think its hardware then take it back to the Apple Store and have it professionally diagnosed. Also, NEVER attempt to upgrade your OS unless your system is 100% stable to begin with, a upgrade will make whatever is wrong MUCH MUCH MUCH more difficult to troubleshoot.

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Answer 2

arancio Author

Level 1

10 points

Mar 27, 2015 9:16 PM in response to rkaufmann87

I was just there today, the first tech after about a half hour stated the power supply should be replaced. Because we are in the middle of tax season I did not want to leave the machine with them for a week. I called them up after I got home and because I did not receive a email detailing my visit. After I reviewed my story with the new guy he said I should load Yosemite because it had a fix for unexpected shutdown. So I tend to believe you a power issue should be hardware and not software. This power issue in particular because the machine will not restart for 5 to 10 minutes as if it needs to cool down first.

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