My iMac can't sleep; I have a request to someone who has an iMac sleeping properly.

My iMac has constantly made call sleep and wakes up on the screen every 15 minutes approximately.  I ran the "journal of the pmset g" Terminal command and tries to interpret the results.

May we with a Mac post well behave the terminal results in "Journal of the pmset g" so I can see what looks like a normal output?  It will help me to get a better idea of what's different in my results.

Also, if someone does not know how to interpret the log, please let me know if you can clearly see problems with my system.  From journal here:

2016-09-11 07:37:37-0500 sleep entering Sleep state due to 'Idle sleep': TCPKeepAlive = active using AC dry 331

2016-09-11 07:37:39-0500 Wake queries [proc = mDNSResponder request = maintenance inDelta = 5885] [proc = UserEventAgent request = SleepService = 27897 info = "AppRefresh:com.apple.apsd.apprefresh, BGTask:com.apple.SoftwareUpdate.Acti vity" inDelta,] [proc = UserEventAgent request = TimerPlugin = 31886 info = "AppRefresh:com.apple.apsd.apprefresh, BGTask:com.apple.SoftwareUpdate.Acti vity" inDelta,] [proc = UserEventAgent request = SleepService inDelta = 27897 info = "AppRefresh:com.apple.mail.ApplicationRefresh BGTask:com.apple.Safari.Safe Browsing.Update",] [* proc = UserEventAgent request = TimerPlugin inDelta = 3597 info = "AppRefresh:com.apple.mail.ApplicationRefresh BGTask:com.apple.Safari.Safe Browsing.Update",] [proc = request NotificationCenter = maintenance inDelta = 48312 info = "com.apple.notificationcenter.dnd"]

2016-09-11 07:37:39-0500 PM Client delays Acks to notifications of sleep: [com.apple.apsd is slow (2564 ms)]

2016-09-11 07:43:05-0500 core customer delays Acks to notifications of sleep: [driver AppleThunderboltNHIType2 is slow (msg: WillChangeState to 2)(364 ms)] [BroadcomBluetoothHostControllerUSBTransport pilot is slow (msg: SetState to 1)(4014 ms)]

2016-09-11 07:43:05-0500 assertions PID 91 (mDNSResponder) MaintenanceWake created "mDNSResponder:maintenance" 00:00:00 id: 0x0xd00000d44 [system: SRPrevSleep kCPU]

2016-09-11 07:43:06-0500 assertions PID 91 (mDNSResponder) published MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id: 0x0xd00000d44 [system: No. Assertions]

2016-09-11 07:43:06-0500 assertions Kernel Idle sleeping antireflux: IODisplayWrangler

2016-09-11 07:43:06-0500 display Notification is enabled

2016-09-11 07:43:08-0500 Wake Wake of Normal sleep [CDNVA] due to XHC1/HID activity: using AC dry 646

2016-09-11 07:43:08-0500 core customer delays Acks to wake notifications: [AirPort_Brcm4360 pilot is slow (msg: SetState to 2)(345 ms)] [AppleIntelMEClientController pilot is slow (msg: SetState to (1) 326 ms)] [PRT0 pilot is slow (msg: SetState (2) 1212 MS)] [AppleHDADriver driver is slow (msg: SetState to 1)(468 ms)] [AMDFramebufferVI driver is slow (msg: SetState to 2)(941 ms)] [en0 pilot is slow (msg (: DidChangeState à 2) (2015 ms)] [AMDFramebufferVI pilot is slow (msg: SetState to 2)(599 ms)]

2016-09-11 07:43:38-0500 notification display is off

2016-09-11 07:43:38-0500 assertions Kernel Idle sleeping antireflux: - none -.

2016-09-11 07:53:39-0500 assertions PID 55 (powerd) InternalPreventSleep created "com.apple.powermanagement.darkwakelinger" 00:00:00 id: 0x0xd00000d65 [system: SRPrevSleep kCPU]

2016-09-11 07:53:54-0500 assertions PID 55 (powerd) TimedOut InternalPreventSleep "com.apple.powermanagement.darkwakelinger" 00:00:15 id: 0x0xd00000d65 [system: SRPrevSleep kCPU]

Sleep / wakes up from boot to the 2016-09-10 21:25:10-0500:0 Wake County dark in this sleep cycle: 0

2016-09-11 07:53:54-0500 sleep entering Sleep state due to 'Idle sleep': TCPKeepAlive = active using AC dry 960

Thanks in advance.

My end result is below. I hope this helps. Sleep works very well for me on OS X 10.11.6. Let me know if oyu have any questions on other parameters.

2016-09-11 11:09:02-0500: showing all currently detained IOKit assertions of power

Systemic assertion status:

BackgroundTask 0

ApplePushServiceTask 0

UserIsActive 1

PreventUserIdleDisplaySleep 0

PreventSystemSleep 0

ExternalMedia 1

PreventUserIdleSystemSleep 0

NetworkClientActive 0

Classified by process of owning:

The NEST 99 (hidd): 00:09:47 [0x00004d1e000903c4] UserIsActive named: 'com.apple.iohideventsystem.queue.tickle '.

Timeout fires in 75 seconds Action = TimeoutActionRelease

56 (powerd) PID: [0x000000180008012c] 05:38:25 ExternalMedia named: 'com.apple.powermanagement.externalmediamounted '.

The Assertions of the kernel: 0x10c = USB, BT - HID, MAGICWAKE

ID = 500 level = 0 x 255 4 = mod USB = 12/31/69, 18:00 description = com.apple.usb.externaldevice.fa140000 owner = Hub keyboard

ID = 501 level = 0 x 255 4 = mod USB = 12/31/69, 18:00 description = com.apple.usb.externaldevice.fd140000 owner = Backup + Office M

ID = 502 level 255 = 0 x 100 = MAGICWAKE mod = 12/31/69, 18:00 description = en0 owner = en0

ID = 503 level = 0 x 255 8 = BT - HID mod = 12/31/69, 18:00 description = com.apple.driver.IOBluetoothHIDDriver owner = BNBMouseDevice

Idle sleep antireflux: IODisplayWrangler

Tags: Mac

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