Sleep not working from power button

Forums › Mac OS › Sleep not working from power button - iMac 2012

Handsomedan

1799 posts

Uber Geek
+1 received by user: 325

Subscriber

Topic # 142758 24-Mar-2014 08:11

I have a 2012 iMac 21.5", which until recently quite happily went to sleep with a brief click of the power button.

Now, it does not.

If I press and hold the power button, it asks me if I want to sleep, log out, power off etc, so the power button is obviously functioning - just not as it once did.

I'm running Mavericks and auto-load any new updates, so am up-to-date on software.

Thoughts?

Handsome Dan Has Spoken.

Buzz Bumble

332 posts

Ultimate Geek
+1 received by user: 61
Inactive user

Reply # 1011591 24-Mar-2014 09:00

Mavericks did change the way the button works. It now has three functions:

- Short press = puts Mac to sleep

- Medium press = asks if you want to restart, sleep, or shut down ("medium" is 1.5 seconds according to Apple, but may need slightly longer)

- Long press = force reset ("longer" is 5 seconds)

I'm not sure why your iMac isn't sleeping. It could be a bug in a recent update which will be fixed in another update, it could be a faulty button, or it could be an application that is causing the iMac to not be able to sleep (choosing Sleep from the menu bar or the power button pop-up window should let you know if that last one is the issue).

MikeB4

12181 posts

Uber Geek
+1 received by user: 5707

Trusted

Reply # 1011613 24-Mar-2014 09:33

try holding the button for about a second, 10.9.2 changed the duration time for these commands

Mike
Retired IT Manager.
The views stated in my posts are my personal views and not that of any other organisation.

It's our only home, lets clean it up then...

Take My Advice, Pull Down Your Pants And Slide On The Ice!

Try Wrike: fast, easy, and efficient project collaboration software

Dairyxox

1354 posts

Uber Geek
+1 received by user: 338

Reply # 1011622 24-Mar-2014 10:03

You should try and Reset the SMC (support.apple.com).

It vaguely applies to this type of issue:

The computer doesn't respond to the power button when pressed.

Handsomedan

1799 posts

Uber Geek
+1 received by user: 325

Subscriber

Reply # 1011664 24-Mar-2014 11:09

Buzz Bumble:

I'm not sure why your iMac isn't sleeping. It could be a bug in a recent update which will be fixed in another update, it could be a faulty button, or it could be an application that is causing the iMac to not be able to sleep (choosing Sleep from the menu bar or the power button pop-up window should let you know if that last one is the issue).

It sleeps quite happily using the mouse and menu, also with the medium click and hold on the power button - just not the short click.

I blame Mavericks.

Handsome Dan Has Spoken.

RunningMan

4804 posts

Uber Geek
+1 received by user: 1491

Reply # 1011871 24-Mar-2014 15:43

KiwiNZ: try holding the button for about a second, 10.9.2 changed the duration time for these commands

This is the key here - 10.9.2 changed it again, so a short press does nothing.

A long press brings up the shutdown menu, a press about 1/2 second will put it to sleep.