macOS Sierra - hold down power button to enter sleep mode

Reseting SMC and NVRAM were no solution on my MacBook Pro 2012. The power button stops working after a couple of days. Also have several other problems (Fan running in standby/Network errors with AFP/...)

I guess we have to wit for the next Service Pack, as Sierra is quite unstable on all 3 Macs.

MacBook 2016, MacBook Pro 15" 2012, MacBook Pro 13" 2010... very sad.

Same here on a late 2013 iMac.

Alt-Cmd-Eject works as always but the power button shows no effect until it force-shuts-down the iMac (so it physically works).

Power Button used to bring the iMac into a sleep on ElCaptain

I've been having a similar yet different issue and that is, that after I put my mac to sleep it doesn't want to wake up. I have not upgraded to Sierra (as far as I know) so I am not sure what is going on.

This happened after El Capitan as they changes the behaviour of the Power button from a quick press to a positive press for a few seconds. Looks like they have changed the behaviour again or they have a critical bug. Annoying!!!

Have anybody been provided feedback that this is an actual bug or that they have changed the behaviour of the power button again. Come on Apple you seem to be dropping the ball on quality, this is not good. Can somebody from support please reply to confirm if this is an issue

Exactly the same as PitDark70. I'm on a 27-inch 'Late 2013' iMac, and the power button won't put the iMac to sleep. It used to be that holding it for a short while used to put it to sleep, but now, no response at all. The only function (as reported by others) it has is holding it for around 10 seconds will do an immediate power-down without any prompt.

Alt-Cmd-Eject (which I never knew about - thanks!) works still.

Only noticed this almost exactly 24-hrs after upgrading to Sierra. Seemed to work fine previously, which is a little odd.

Hello, I am having the same problem, power button doesn't work to put my iMac to sleep. Anyone from Apple Support that can give us information about this issue and when we will have an update for MacOS Sierra.

Thx.

Try Command+Option+Power button

This is how to sleep for Macs with CD drives but for some reason it's the case with the power button as well.

I have an iMac (Retina 5K, 27-inch, Late 2014) and have the issue after updating to macOS Sierra. Pressing the power button once to put to Mac to sleep simply stopped working. Please fix this bug.

I have too just found this problem and find it very annoying. As too is the inability to pickup a proxy Pad file!!

Now it happens on both MacBook 2016 and MacBook Pro 2012, so it is an issue with the OS. After a while the power button stops working, it is not a problem on the MacBook 2016 as I can just close it, but the macBook Pro has an external Monitor attached, so it does not go to sleep when I close it.

Same issue..holding down the power button for 10 seconds is a hard shut down.

Ctrl + Power is working but not very usefull. Why is it not possible to set the keys in the apple settings (like on linux, windows etc.).

ps. Rebooting several times isn't working at all. After some sleeps it's not working anymore.

All,

I have had an online chat with Apple Support and they appeared to have resolved the issue. Open a Terminal session and enter the following

defaults write com.apple.loginwindow PowerButtonSleepsSystem -bool yes

It works for me so good luck

Dylan

works for the moment, lets see if it works for longer (after some sleeps or reboots)

Thank you for this suggestion but would be better if Apple fixed the newly created bug. Really do not want to press multiple keys to put my laptop into sleep mode, especially since the functionality existed in a simpler format for El Capitan.