Mac Pro 2012 (5.1)12 Core Idle sleep preventers

Hi Linc!

I have a problem:

when i like to delete the file, the system says that i haven't the privileges to delete it… i am the owner.

The operation can not be completed because you do not have permission to access some elements.

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

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.

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

Dear Linc Davis, thank you very much, my MacBook pro Retina late 2012 having the same issue, but when I wanted to send the sleepimage to Trash, it prompted ' The operation can’t be completed because you don’t have permission to access some of the items.' What to do now? Please help. Regards, Dr Mostafa

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.

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

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.

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.