macOS Sierra - hold down power button to enter sleep mode

Broken again, after 6 days..

Well well, I tried all the suggestions above, and the command line fix also stopped working after a few sleeps.

BUT, I noted a strange behaviour that might give developers working on this bug fix some useful clue. This is what happened to me, and it seems like a repetitive behaviour: after the Power button stops working as it should, go to Apple logo, then choose Shut down.., and when the shutdown window appears (with a warning saying that shutting down may cause other users to lose data..), press Cancel. Now, from that moment on, a short press (say 1 second) on the Power button always brings on this Shutdown warning window ⚠, which is new, wrong, and even more strange a behaviour. And fn+Power button does the same. It doesn't offer between Sleep and Shut down any more.

If someone can try and report the same or similar behaviour?!

And of course, we can now only hope that someone from Apple MacOS development team reads this.. if you ask me, that is such a major bug, I mean, the power button not working..

Not waking up would be a 'major' bug. Not sleeping (for a small number of users) is not.

Right, so as long as the machine wakes up we should be happy 🙂 ? I hope not.

I do not want to start a polemic here, but I do refuse to lower my user experience expectations here. Even the tiny quick start guide that comes with a MacBook tells a user what the Power button is for, and I would expect it to just work, sorry. And I am not so sure about your "small number of users" argument. Your estimate may be wrong. I suppose that not a big percentage of users know how to, or bother at all, report on the issue.

Or they are not affected by it

That's the problem with speculation, not only is it forbidden here, it is just speculation.

But it is you that speculated, sorry, not me. You mention a small number of users being affected, and you use that argument for teaching us that this is not a major bug. I just replied that this argument of yours - quote - "may be" a wrong estimate. I will leave it at that and will only reply if my response could help Apple or other affected users to resolve the problem.

I suppose that not a big percentage of users know how to, or bother at all, report on the issue.

Looks speculative to me.

Sadly, the new macOS version 10.12.1 (from late Oct. 2016) does not solve this problem. Power button still not behaving as it should (the official support.apple.com site says to use the power button for putting the Mac to sleep under macOS Sierra). Has anyone found a fix that works, before I call the support?

after updating to the latest Sierra it solved the issue for me .

not sure why not for everyone

Hey Ktana, just check it after a few sleeps/days... I was "fixed" because you restarted the Mac ...than it's working for a few times. But than again broken. So the update to 10.12.1 wasn't helpful.
NOT YET FIXED... nice work Apple

I do have the exact same issue. Still not solved. Not really bothering, it was just a good habit.

+1 – very annoying.

ktana wrote:

after updating to the latest Sierra it solved the issue for me .

not sure why not for everyone

Because everyone is not the same, and neither are there Macs.

I'm having similar issues.

After the last update my laptop would not boot up after a kernel panic for almost a week.

I have a different issue, even this one related to shutdown, both in a MacMini or a MacBoookPro: I had always used CTRL-Eject to show the shutdown dialog box (or the 1,5 sec power button). When you did this (with both ways) you had the dialog shutdown box as the active window and you could just hit Enter to power off your Mac.

Now this dialog box is no longer the active window and this is very annoying because prevents from just pressing Enter; instead you have to use your mouse to activate this window and then you can press Enter.
Not even CMD-TAB is good to activate the dialog box. Very, very, very annoying.

I have the same problem. If I reboot - it works for a while, then it stops working. I have to press it repeatedly to get the computer to come back to life. Additionally, it won't pull up the sleep/shutdown/restart dialog box either. I have cleared caches, reset the PMU - all to no avail. When will wi have a resolution?