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Mac Pro 2012 (5.1)12 Core Idle sleep preventers

Idle sleep preventers: IODisplayWrangler shows using "  pmset -g assertions   "   command in Terminal. My MacPro 5.1 wont sleep at all because of this ..

Haven't been able too find a solution, Apple are you aware of the problems and are you going to correct them.... !!!

I have to continually shut down the mac otherwise

Mine shows the same output, but it has no trouble sleeping, so that's not the cause.

Test after each of the following steps that you haven’t already tried:

Step 1

Take all the applicable steps suggested in this support article. That's the starting point for any further effort to solve the problem. Skipping any of those steps may mean that the problem won't be solved.

Note that, as stated in the article, the computer will not sleep if some sharing services are enabled. From the menu bar, select

           ▹ System Preferences... ▹ Sharing

Turn off all sharing services.

Step 2

If iTunes Music Sharing or Home Sharing is enabled, disable it or quit iTunes. Do the same with any third-party applications that have a similar feature.

Step 3

Select

           ▹ System Preferences... ▹ Accessibility ▹ Speakable Items: Off

Step 4

Select

           ▹ System Preferences... ▹ Bluetooth ▹ Advanced...

and uncheck both boxes marked

          Open Bluetooth Setup Assistant at startup if...

Step 5

Reset the printing system.

Step 6

Back up all data.

Triple-click the line below on this page to select it, then copy the text to the Clipboard by pressing the key combination  command-C:

/var/vm

In the Finder, select

          Go ▹ Go to Folder...

from the menu bar and paste into the box that opens by pressing command-V. You may not see what you pasted because a line break is included. Press return.

A folder named "vm" should open. Inside it, there may be a file named "sleepimage". Move that file, and only that one, to the Trash, but don't empty yet. You'll be prompted for your password. Close the folder window.

Restart the computer and empty the Trash.

Thanks Linc,

helpful comments - I can see your wisdom in them, but i found that the mac pro will sleep only once its energy saver parameters are met, and not at my command when told to go to sleep, Despite having sharing on for printer & iTunes  - I note that Yosemite thru to Mavericks didn't disrupt manual sleep like El Capitan does. Wondering if its because the  machine is " now so OLD " according to apple store staff.

It's not clear whether you took any of the steps I suggested.

most but not all as i only have bluetooth trackpad & keyboard with my mac , so hidd process killing & turning off bluetooth would be detrimental to my usage. The Mac Pro will happily sleep once the energy save timeout comes into play, but seems to stubbornly refuse manual sleep requests or stays on till some job is done (whatever that is) , whereas my experience with Mavericks & Yosemite - a manual sleep request was immediate ... your suggestions have been helpful as I have investigated a few of those options from the apple site too

many thanks

Linc's original post was a big help. I've had problems getting my Mac to sleep for a long time. By turning off several Sharing options in System Preferences I can now make it sleep manually, and it goes to sleep on its own now consistently.

iTunes Home Sharing was the culprit for me. Found it easily by going to Activity Monitor -> Energy and checking the entries in the "Preventing sleep" column.

Yes, you are the man! I thought it was just that my battery was getting old but then i put my System Hard Drive into a newer machine and the symptoms persisted so i knew it was in the system not the hardware. At first i thought it was something to do with the message "Idle sleep preventers: IODisplayWrangler"
  When you run "pmset -g assertions" in Terminal.
  However it has nothing to do with it as i still get that message.
Even if it did have something to do with these settings i wouldn't know where to start. I don't have a clue at system level stuff. I am always scared when i paste something i found online into terminal
  Pure genius. Thank you.

You don't have to disable bluetooth. Just de-activate some of the special features that can listen for another device that is trying to wake your machine.
  However i think your issue is different. Keep searching and good luck.

I jumped the gun. I get a few seconds of sleep but then it shuts down and the restart is always quite a long one.

Hi,

I bought my MacBook pro two weeks ago and since one week I have problem to sleep it. It's not working when close the lid and also when choose  -> sleep.

I tried all of your steps and didn't work.

Does anyone have an idea why it still don't work?

Hi Linc, I took all your suggested steps and still no luck. We days back sleep function stopped working. (iMac Mid 2010). Any other tips?

The only thing I can see when I do pmset -g assertions is the below:

Idle sleep preventers: IODisplayWrangler

Otherwise, both processes below are 0

PreventUserIdleDisplaySleep

PreventUserIdleSystemSleep

Thanks

最后更新：2017-08-21 19:18:03

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