macOS: MacBook Pro doesn't sleep when closing the lid

root's picture

I had this problem the other day: my macbook pro was not sleeping when closing the lid.
I was 100% sure I have not modified any power settings nor installed new applications so I had to dig up a bit more.
Reading few websites about similar problems got me to a tool which helped me find the source of this problem.

The command pmset -g was showing me several applications that could prevent my system from going to sleep (line in red).

florians-MacBook-Pro:~ florian$ pmset -g
System-wide power settings:
Currently in use:
 womp                 0
 halfdim              1
 sms                  1
 hibernatefile        /var/vm/sleepimage
 gpuswitch            2
 networkoversleep     0
 disksleep            10
 sleep                0 (sleep prevented by UserEventAgent, UserEventAgent, configd, backupd, backupd, mds_stores, AddressBookSourceSync)
 hibernatemode        3
 ttyskeepawake        1
 displaysleep         15
 acwake               0
 lidwake              1

However, it did not provided more details about them.
The proper command to get these details is pmset -g assertions:

florians-MacBook-Pro:~ florian$ pmset -g assertions
2017-01-14 01:15:38 +0200 
Assertion status system-wide:
   BackgroundTask                 1
   ApplePushServiceTask           0
   UserIsActive                   1
   PreventUserIdleDisplaySleep    0
   PreventSystemSleep             1
   ExternalMedia                  0
   PreventUserIdleSystemSleep     1
   NetworkClientActive            0
Listed by owning process:
   pid 63(UserEventAgent): [0x00001b41000b852c] 00:06:53 BackgroundTask named: "com.apple.mds.0" 
	Created for PID: 87. 
   pid 63(UserEventAgent): [0x00001776000b84b5] 00:23:04 BackgroundTask named: "com.apple.backupd-auto" 
	Created for PID: 257. 
   pid 74(configd): [0x0000161a00078478] 00:28:53 DenySystemSleep named: "InternetSharingPreferencePlugin" 
   pid 2151(backupd): [0x00001796000184bf] 00:22:32 PreventUserIdleSystemSleep named: "Time Machine backup" 
   pid 2151(backupd): [0x00001796000b84be] 00:22:32 BackgroundTask named: "Time Machine backup" 
   pid 2732(AddressBookSourceSync): [0x00001cdb00018554] 00:00:04 PreventUserIdleSystemSleep named: "Address Book Source Sync" 
	Timeout will fire in 1796 secs Action=TimeoutActionTurnOff
   pid 330(mds_stores): [0x000019d1000b850b] 00:13:01 BackgroundTask named: "com.apple.metadata.mds_stores.power" 
   pid 131(hidd): [0x00000f81000982b3] 00:57:02 UserIsActive named: "com.apple.iohideventsystem.queue.tickle.4294968500.11" 
	Timeout will fire in 895 secs Action=TimeoutActionRelease
Kernel Assertions: 0x108=BT-HID,MAGICWAKE
   id=503  level=255 0x8=BT-HID mod=01/01/1970, 02:00 description=com.apple.driver.IOBluetoothHIDDriver owner=BNBMouseDevice
   id=504  level=255 0x100=MAGICWAKE mod=01/01/1970, 02:00 description=en1 owner=en1
Idle sleep preventers: IODisplayWrangler

By looking at the details I found one process that I recently enabled: Internet Sharing.
That was it! Once I disabled the internet sharing, my macbook was able to sleep again!

If you are in the same situation, I hope these two commands above will help you find the way.
Cheers!

Thou shalt not steal!

If you want to use this information on your own website, please remember: by doing copy/paste entirely it is always stealing and you should be ashamed of yourself!
Have at least the decency to create your own text and comments and run the commands on your own servers and provide your output, not what I did!

Or at least link back to this website.