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- Nov 8, 2013
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- Your Mac's Specs
- 16Gb iPhone4S, 64Gb WiFi iPad Air, iMac 21.5
Late 2013 21" iMac. Twice now I have found the computer shut down from sleep mode. No response to power on via power switch. Both occasions removing the power cord and refitting it has worked and the power switch works normally. Very strange. Any ideas/suggestions please. Am I missing something obvious as a Mac newbie?