iMac will not shut down or restart...

I have an iMac 27 "end 2012, running El Capitan 10.11.5 and since the last update to version, it will not shut down or restart. I tried unplugging the power for about 10 minutes, but that didn't work... any notice or is this just a glitch in the latest update?

DRM92692 wrote:

I have an iMac 27 "end 2012, running El Capitan 10.11.5 and since the last update to version, it will not shut down or restart. I tried unplugging the power for about 10 minutes, but that didn't work... any notice or is this just a glitch in the latest update?

Your office is frozen?   If not, stop or reboot can wait for something to finish - you close all open applications?   Allow you your system to connect to the internet (these pesky background downloads or you are not always aware of synchronization)

As for hard shutdown - with button / stop

Have you held in the power button for about 15 seconds to stop hard - otherwise he's asleep.

After unplugging - press and hold the power button in for 15 seconds to evacuate the power of mac - that can help.

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