HT1776 Mac won't sleep automatically

Despite attending to all of the issues mentioned in this article, my machine won't sleep automatically. However, I've found that using SleepNow (http://www.dragonone.com/products/macosx/pleasesleep/) works like a charm. Apple should do something similar.

Wow thank you. I have been struggling with my macbook for about a year with this issue. Even after complete reinstall of the system, on new hard drives etc. nothing seemed to work. It drove me nuts coming back to my computer 2 hours later to find it completely dead because the computer would. not. sleep. ever!
This free simple tool took about 15 seconds to get on and running, and problem gone. Thanks so much.
Apple get on this...

Similar Messages

Pro won't sleep automatically

Bought a new pro and used migration assistant to move stuff from my iMac.
Now the Pro won't sleep automatically. It sleeps when I tell it to or on Schedule at 0100 but not after x mins of inactivity.
The iMac it migrated from had no such issues.
Is there any reset I can do to cure the problem?

I have about a 2 year Mac pro (intel) and it will not sleep on its own. I can manually sleep it.
The hard drive cycles up and down about every 2 minutes or so continually and the display remains blank. It will keep cycling the drive until I manually sleep it.
I tried a few times doing the reset thing and once it helped but in a week or so it started to do it again. I went and made up a new user and it seemed to fix it for a month and then it want back to doing it again. It is very annoying. I even updated it to Leopard and it sill did it. I'll try the reset again and see.

Mac won't sleep - Reason?

I am trying to figure out why my mac won't sleep.
I have run this command in the teminal (pmset -g assertions) and this is what I get back. If anyone can let me know what the problem is I would appreciate it. I have disconnected everything from the machine such as firewire, usb cables etc. But the computer will not sleep on its own. It does when I initiate it but not by the automatic function in energy saver pref pane.
Thx
Felix
mac-pro:~ felixbird$ pmset -g assertions
7/14/12 7:15:56 AM PDT
Assertion status system-wide:
   PreventUserIdleDisplaySleep             0
   CPUBoundAssertion                       0
   DisableInflow                           0
   ChargeInhibit                           0
   PreventSystemSleep                      0
   PreventUserIdleSystemSleep              0
   ExternalMedia                           0
   DisableLowPowerBatteryWarnings          0
   EnableIdleSleep                         1
   NoRealPowerSources_debug                0
   UserIsActive                            0
   ApplePushServiceTask                    0
Kernel Assertions: 0x0004
* Kernel Assertion ID = 500
   Created At = 12/31/69 4:03:23 PM PST
   Modified At = 12/31/69 4:00:00 PM PST
   Owner ID = 0xffffff802079e000
   Level = 0
   Assertions Set = None (4)
* Kernel Assertion ID = 501
   Created At = 12/31/69 4:03:30 PM PST
   Modified At = 7/14/12 7:08:33 AM PDT
   Owner ID = 0xffffff80207c7000
   Level = 255
   Assertions Set = None (4)
* Kernel Assertion ID = 502
   Created At = 7/14/12 7:05:04 AM PDT
   Modified At = 12/31/69 4:00:00 PM PST
   Owner ID = 0xffffff81a012c000
   Level = 0
   Assertions Set = None (4)
* Kernel Assertion ID = 503
   Created At = 7/14/12 7:05:04 AM PDT
   Modified At = 12/31/69 4:00:00 PM PST
   Owner ID = 0xffffff81a012f000
   Level = 0
   Assertions Set = None (4)
* Kernel Assertion ID = 504
   Created At = 7/14/12 7:05:04 AM PDT
   Modified At = 12/31/69 4:00:00 PM PST
   Owner ID = 0xffffff81a0129000
   Level = 0
   Assertions Set = None (4)
* Kernel Assertion ID = 505
   Created At = 7/14/12 7:05:16 AM PDT
   Modified At = 12/31/69 4:00:00 PM PST
   Owner ID = 0xffffff81a0145000
   Level = 0
   Assertions Set = None (4)
* Kernel Assertion ID = 506
   Created At = 7/14/12 7:05:16 AM PDT
   Modified At = 12/31/69 4:00:00 PM PST
   Owner ID = 0xffffff81a0148000
   Level = 0
   Assertions Set = None (4)
* Kernel Assertion ID = 507
   Created At = 7/14/12 7:05:16 AM PDT
   Modified At = 12/31/69 4:00:00 PM PST
   Owner ID = 0xffffff81a0132000
   Level = 0
   Assertions Set = None (4)

If it is'nt the card, this may help;
If your Mac happily goes to sleep but won't wake up--Hold down the power switch to force-reboot your machine and get it running again.
Don't worry-your Mac isn't narcoleptic. Its Open Firmware system or NVRAM (nonvolatile RAM) is likely corrupt, and your Mac can't remember how to wake up.
Restart your Mac and immediately hold down the Command-Option-O-F key combo until you see a somewhat intimidating command-line display that ends with the Open Fimware prompt. Type the following lines:
reset-nvram
press Return on keyboard
set-defaults
press Return
reset-all
press Return
Your Mac will reboot. Once it's running, put it back to sleep to test. If the problem recurs your Energy Saver preferences may be the culprit. Delete the com.apple.PowerManagement.plist file (go to Finder/Hard drive/Library/Preferences/SystemConfiguration)--don't worry, your Mac will regenerate a new one--and then restart to see if that rights the wrong.
Still did'nt work? Might be time to call AppleCare or see an Apple Genius or a technician.
Cheers!
DALE

G5 won't sleep automatically

In an effort to save electricity and $$, I put my G5 on a sleep timer (10 minutes).
But it does not go to sleep by itself. Using the Sleep menu command works.
Any settings I might be missing that could be interfering with self-sleep?

just want to add my 2 cents - I've had this problem forever (it seems).
Standard PowerMac G5, aluminum 20" cinema display, firewire sight, white keyboard and mighty mouse.
Mac will NOT sleep automatically under any circumstances.
Mac will sleep when power button on tower or side of screen is pressed.
Mac will sleep, restart and power down when selected from the apple menu.
I've tried removing ram, pressing the SMU button, deleting Prefs, creating/deleting users.
Basically everything except installing clean from the Leopard DVD.
I've just learned to live with the 'fault' and choosing sleep manually.
If anyone can come up with a solution though, I will be forever in their debt....
cheers

Why my Mac won't connect automaticly to Wifi from boot or when waking from sleep?

Hi!
I have 2TB Time Capsule with bridged WiFi.
When I reboot or wake up my MBP from sleeping it won't connect automaticly to my Home WiFi network. I allways need to connect by hand. This problem has been in the Os X Lion and Os X Mountain Lion.
Any other WiFi networks don't have this problem, only with Time Capsule.
Time Capsule has 7.6.1 software and also older software's had this exact same problem
My MBP is:
2.3GHz Intel Core i5
8GB 1333 Mhz DDR3
And the WiFi chip is:
Card Type: AirPort Extreme (0x14E4, 0xD6)
Firmware Version: Broadcom BCM43xx 1.0 (5.106.98.81.20)
Does anybody else run in to this kind of problem?
Oh and everything else with WiFi is working normally (Phones, iPad's etc even PC's =) )

I was having this same issue with a brand new 2012 MacBook Air after updating to Mountain Lion and using an AirPort Extreme. Most times waking from sleep would result in a lockup as the system would continously try to find my network (the WiFi menu would just keep cycling). After going to 10.8.1 it still continued so I started looking at other possibilities. I noticed that the security setting on my AirPort Extreme (current generation) was set to WPA/WPA2. I changed it to WPA2 and the problem so far (2 days in a row) has gone away.

PowerMac won't sleep automatically unless a DVD is inserted

I have a rather strange issue with my G5 - even though I have selected "Put the computer to sleep when it is inactive for 5 minutes" in System Preferences/Energy Saver, my computer never sleeps. However, when I have a DVD in the tray, the computer sleeps automatically every time. Any idea why a DVD in the tray makes a difference? And how can I have the computer sleep automatically when a DVD is not inserted? Thanks!

You say a DVD installed. Does it do the same with a CD installed?
Strange indeed. Look at this link.
Mac OS X: Why your Mac might not sleep or stay in sleep mode
http://support.apple.com/kb/HT1776
Install this free utility & see if it will sleep properly.
PleaseSleep
http://www.dragonone.com/products/macosx/pleasesleep/
 Cheers, Tom

Insomnia - - My Mac won't SLEEP

Hi folks,
I just re-installed OS 10.5.4, ... and began to have a couple buggy behaviours:
Primarily, my computer won't respond when I try to put it in SLEEP mode.
Also, there is a funky little 1/4" square that appears in every window that opens. Clicking & dragging over it makes it go away, but it then reappears on the next open window.
p.s. In an attempt to 'fix' these anomolies, I downloaded the upgrade to 10.5.8 but this didn't help.
Any ideas ????? (This is my second post... with no responses).
Thanks,
P

This is for a Mac that won't sleep.
Here is Apple's KB article HT1776 with their tips.
Mine follow;
USB devices and hubs often cause Macs to not sleep or wake quickly from sleep (notably HP printers and scanners, HP all in ones, and Cannon scanners). Disconnect all USB except for keyboard and mouse and try. If it sleeps, add one back at a time testing after each one to find the culprit.
If you've set your Mac to receive faxes, it may not be able to sleep. It might also have a damaged preferences file.
If you use your Mac for faxing, open System Preferences. click Print & Fax, click the Faxing tab, and uncheck the Receive Faxes On This Computer box.
If that doesn't work or you've never faxed on your Mac, go to Finder/Hard Drive /Library/Preferences/SystemConfiguration and delete the com.apple.PowerManagement.plist and com..apple.AutoWake.plist files (if your Mac asks, type your admin. password).
If the latter file isn't present in the folder, go to user name(probably your name)/Library/Preferences, delete the com.apple.systemuiserver.plist file, and reboot your Mac.
Hope this helps!
P.S. One member here reported this (Michael Gleason);
"I have had this problem with my IMac G5. It is surprisingly irritating. LaCie's Silverkeeper backup software was the cause. By default it gave itself permission to wake up the computer to check if a backup was needed. Do you have this or a similar program installed which has scheduled activities including wake-up permissions as an option?"
Dave Hamilton provided this link, xlr8yourmac.com, to a member, which addresses failure of deep sleep with some users that updated and added new FireWire and USB card.
Also, here is Apple KB article TA2469 about PCI cards and sleep.
tomhorvat adds this; After few days of messing around I found out that I had desktop background (wallpaper) set to change every 1 minute.
After unchecking "Change picture..." in system preferences (under Desktop/Screen saver), my powerbook went to sleep all by itself.
Tristan Currier noticed this; "I have a Canon printer(shared) and my imac would not sleep. I opened up printer/fax in system prefs and noticed it said the printer was in use when it was off. Opened up the printer queue and noticed about 7 pending documents. Deleted them all and now it sleeps.
Check the printer queue!"
Allan Jones says "sometimes there is Network activity: launch System Preferences > Energy Saver > "Options" tab and uncheck "Wake for Ethernet network administrator access."
Good Luck!  DALE

MBP won't sleep automatically.

My Macbook Pro won't go to sleep and it's driving me crazy.
I have been watching my processes closely and haven't seen anything that would keep it awake. The screen goes off like usual but it won't actually go to sleep on its own.
I can make it sleep by closing the lid or pressing sleep under the apple logo.
I deleted com.bjango.istatlocal in my Library> launchagents folder
here are my computers processes
(com.bjango.istatlocal[193]) posix_spawn("/Library/Application Support/iStat local/iStatLocal", ...): No such file or directory
9/22/09 4:55:59 PM com.apple.launchd.peruser.501[80] (com.bjango.istatlocal[193]) Exited with exit code: 1
9/22/09 4:55:59 PM com.apple.launchd.peruser.501[80] (com.bjango.istatlocal) Throttling respawn: Will start in 10 seconds
9/22/09 4:56:09 PM com.apple.launchd.peruser.501[80] (com.bjango.istatlocal[194]) posix_spawn("/Library/Application Support/iStat local/iStatLocal", ...): No such file or directory
9/22/09 4:56:09 PM com.apple.launchd.peruser.501[80] (com.bjango.istatlocal[194]) Exited with exit code: 1
9/22/09 4:56:09 PM com.apple.launchd.peruser.501[80] (com.bjango.istatlocal) Throttling respawn: Will start in 10 seconds
9/22/09 4:56:19 PM com.apple.launchd.peruser.501[80] (com.bjango.istatlocal[198]) posix_spawn("/Library/Application Support/iStat local/iStatLocal", ...): No such file or directory
9/22/09 4:56:19 PM com.apple.launchd.peruser.501[80] (com.bjango.istatlocal[198]) Exited with exit code: 1
9/22/09 4:56:19 PM com.apple.launchd.peruser.501[80] (com.bjango.istatlocal) Throttling respawn: Will start in 10 seconds
9/22/09 4:56:23 PM com.apple.launchd.peruser.501[80] ([0x0-0x12012].com.apple.Console[124]) Exited: Killed
9/22/09 4:56:43 PM com.apple.launchd[1] * launchd[1] has started up. *
9/22/09 4:57:13 PM com.wacom.wacomtablet[72] TabletDriver[72]: Env RUNWITHLAUNCHD is set to 1
9/22/09 4:57:14 PM com.apple.WindowServer[54] Tue Sep 22 16:57:14 chad-muellers-macbook-pro.local WindowServer[54] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
9/22/09 4:57:28 PM com.wacom.wacomtablet[81] TabletDriver[81]: Env RUNWITHLAUNCHD is set to 1
9/22/09 4:57:28 PM com.apple.launchd.peruser.501[82] (com.apple.ReportCrash) Falling back to default Mach exception handler. Could not find: com.apple.ReportCrash.Self
9/22/09 4:57:28 PM com.wacom.wacomtablet[81] TabletDriver[81]: RunApplication called while eStopping
9/22/09 4:57:28 PM com.apple.launchd[1] (com.wacom.wacomtablet[81]) Exited with exit code: 255
9/22/09 4:57:30 PM com.wacom.wacomtablet[107] TabletDriver[107]: Env RUNWITHLAUNCHD is set to 1
9/22/09 4:57:30 PM com.apple.launchd.peruser.501[82] (com.apple.Kerberos.renew.plist[104]) Exited with exit code: 1
9/22/09 4:57:31 PM com.apple.launchd.peruser.501[82] ([email protected][109]) Exited with exit code: 1
9/22/09 5:07:44 PM [0x0-0x1a01a].org.mozilla.firefox[165] Debugger() was called!
9/22/09 5:08:28 PM iChatAgent[160] [Warning] [AIM] Could not change my visibility to 0
9/22/09 5:08:31 PM iChatAgent[160] [Warning] AIMBuddyList::OnDownloadError: user=oxygensk8z, error=(code=3, subcode=0, category=7, url="", message="")
9/22/09 5:08:31 PM iChatAgent[160] [Warning] AIMBuddyList::OnDownloadError: user=unfknstpbl666, error=(code=3, subcode=0, category=7, url="", message="")
9/22/09 5:08:31 PM iChatAgent[160] [Warning] AIMBuddyList::OnDownloadError: user=drboboh, error=(code=3, subcode=0, category=7, url="", message="")
9/22/09 5:08:31 PM iChatAgent[160] [Warning] AIMBuddyList::OnDownloadError: user=m3alpine97, error=(code=3, subcode=0, category=7, url="", message="")
9/22/09 5:08:31 PM iChatAgent[160] [Warning] AIMBuddyList::OnDownloadError: user=shahab323is, error=(code=3, subcode=0, category=7, url="", message="")
9/22/09 5:08:31 PM iChatAgent[160] [Warning] AIMBuddyList::OnDownloadError: user=myiprelay, error=(code=3, subcode=0, category=7, url="", message="")
9/22/09 5:08:31 PM iChatAgent[160] [Warning] AIMBuddyList::OnDownloadError: user=santaclaus, error=(code=3, subcode=0, category=7, url="", message="")
9/22/09 5:08:31 PM iChatAgent[160] [Warning] AIMBuddyList::OnDownloadError: user=santaclaus, error=(code=3, subcode=0, category=7, url="", message="")
9/22/09 5:08:31 PM iChatAgent[160] [Warning] AIMBuddyList::OnDownloadError: user=woobiee101, error=(code=3, subcode=0, category=7, url="", message="")
9/22/09 5:18:18 PM [0x0-0x1a01a].org.mozilla.firefox[165] Debugger() was called!
9/22/09 5:20:49 PM com.apple.launchd[1] * launchd[1] has started up. *
9/22/09 5:21:18 PM com.wacom.wacomtablet[69] TabletDriver[69]: Env RUNWITHLAUNCHD is set to 1
9/22/09 5:21:18 PM com.apple.WindowServer[50] Tue Sep 22 17:21:18 chad-muellers-macbook-pro.local WindowServer[50] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
9/22/09 5:23:52 PM com.wacom.wacomtablet[93] TabletDriver[93]: Env RUNWITHLAUNCHD is set to 1
9/22/09 5:23:52 PM com.apple.launchd.peruser.501[95] (com.apple.ReportCrash) Falling back to default Mach exception handler. Could not find: com.apple.ReportCrash.Self
9/22/09 5:23:52 PM com.wacom.wacomtablet[93] TabletDriver[93]: #### GetFrontProcess failed to get front process (-600)
9/22/09 5:23:52 PM com.wacom.wacomtablet[93] TabletDriver[93]: RunApplication called while eStopping
9/22/09 5:23:52 PM com.apple.launchd[1] (com.wacom.wacomtablet[93]) Exited with exit code: 255
9/22/09 5:23:58 PM com.wacom.wacomtablet[117] TabletDriver[117]: Env RUNWITHLAUNCHD is set to 1
9/22/09 5:23:59 PM com.apple.launchd.peruser.501[95] (com.apple.Kerberos.renew.plist[114]) Exited with exit code: 1
9/22/09 5:24:00 PM com.apple.launchd.peruser.501[95] ([email protected][119]) Exited with exit code: 1
9/22/09 5:26:59 PM [0x0-0x17017].backupd-helper[162] Not starting Time Machine backup after wake - failed to resolve alias to backup volume
PLEASE HELPP!!!!!
Message was edited by: Slvre39

This is for a Mac that won't sleep.
Here is Apple's KB article HT1776 with their tips.
Mine follow;
USB devices and hubs often cause Macs to not sleep or wake quickly from sleep (notably HP printers and scanners, HP all in ones, and Cannon scanners). Disconnect all USB except for keyboard and mouse and try. If it sleeps, add one back at a time testing after each one to find the culprit.
If you've set your Mac to receive faxes, it may not be able to sleep. It might also have a damaged preferences file.
If you use your Mac for faxing, open System Preferences. click Print & Fax, click the Faxing tab, and uncheck the Receive Faxes On This Computer box.
If that doesn't work or you've never faxed on your Mac, go to Finder/Hard Drive /Library/Preferences/SystemConfiguration and delete the com.apple.PowerManagement.plist and com..apple.AutoWake.plist files (if your Mac asks, type your admin. password).
If the latter file isn't present in the folder, go to user name(probably your name)/Library/Preferences, delete the com.apple.systemuiserver.plist file, and reboot your Mac.
Hope this helps!
P.S. One member here reported this (Michael Gleason);
"I have had this problem with my IMac G5. It is surprisingly irritating. LaCie's Silverkeeper backup software was the cause. By default it gave itself permission to wake up the computer to check if a backup was needed. Do you have this or a similar program installed which has scheduled activities including wake-up permissions as an option?"
Dave Hamilton provided this link, xlr8yourmac.com, to a member, which addresses failure of deep sleep with some users that updated and added new FireWire and USB card.
Also, here is Apple KB article TA2469 about PCI cards and sleep.
tomhorvat adds this; After few days of messing around I found out that I had desktop background (wallpaper) set to change every 1 minute.
After unchecking "Change picture..." in system preferences (under Desktop/Screen saver), my powerbook went to sleep all by itself.
Tristan Currier noticed this; "I have a Canon printer(shared) and my imac would not sleep. I opened up printer/fax in system prefs and noticed it said the printer was in use when it was off. Opened up the printer queue and noticed about 7 pending documents. Deleted them all and now it sleeps.
Check the printer queue!"
Allan Jones says "sometimes there is Network activity: launch System Preferences > Energy Saver > "Options" tab and uncheck "Wake for Ethernet network administrator access."
Good Luck!  DALE

IMac (late 2009) won't sleep automatically

Hi everyone,
I hope anyone can help me out with this:
My iMac doesn't go to sleep automatically after the time I set in the preferences menu. The only thing that happens is that the display switches off.
I already tried several things:
deleted the file com.apple.PowerManagement.plist (Macintosh HD/Library/Preferences/SystemConfiguration)
detached all external devices
SMC reset.
turned off all running applications
None of these solutions worked for me.
I know that the auto sleep worked some months ago, but I don't know what made it not work anymore.
The sleep mode still works when I manually enter it by clicking the sleep button in the Apple menu or by pushing the Mac's power button.
Any ideas except using PleaseSleep?
Thanks for any help!

Hey Mad-Hias, greetings from the US. I use dyndns.com, you can get a free dynamic ip there as well as a Mac client. Many routers have a built in Dynamic DNS service but my Apple Extreme doesn't so I ended up using dyndns...
As for the sleep issue and my take on PleaseSleep. I think that the computer should work, period. If there is something going on that is preventing it from going to sleep when it is idle, I want to know about it in a log file or something, I want the system to do a better job logging this than it is currently doing in the console so that I can troubleshoot and fix and not have to resort to third party software. In OSX, if it is possible to have a process prevent sleep, then there should be a log file to show which processes are preventing sleep...
My latest bought with this lasted 5 months with my 2010 iMac before I decided to fix it:
My findings:
1. Computer will not sleep automatically.
2. What I tried:
PRAM and SMC reset, creating new user accounts and testing, erasing some plist files, unplugging everything, uninstalling hp and brother printer and scanner drivers, closing all apps, restoring default energy saver, looking for stuff in console and activity monitor, NOTHING worked...
for me the combination that fixed it was to make sure your time machine backup is good, deactive your computer in itunes, reinstall your OS from scratch + updates, DON'T restore using the Migration Assistant, this always broke sleep for me. Manually copy back your data using finder + time machine but NOT your apps. For me even the seemingly unrelated act of copying my apps from time machine even to a different drive (not the boot drive), broke sleep! Re-install your apps one by one and everything should work. This is a lot of work but I now have a sleeping computer.
After doing all of this, I discovered that I had installed the dns update app which talks to the update service over the internet every two minutes, breaking sleep...
For the sake of putting a nail on this coffin and putting this issue to "sleep", at least for me, I will do a complete re-install this weekend with a full Time Machine restore using Migration Assistant of all apps + data of my working system and test again. This will give me confidence of using the Migration Assistant in the future.
One thing I almost forgot to mention is that you can use the command "sudo fs_usage" after you've closed all open apps and disabled all types sharing temporarily for your system to quiet down. I discovered the dns update problem this way...It was writing to the hard drive frequently, preventing sleep...

Won't Sleep Automatically

Strange happening: I can manually put the computer to sleep, and when I close the lid it goes to sleep. However... it will not go to sleep at the time set in the Energy Saver Preference Panel. Thoughts?
PB G4 Ti 867 Mac OS X (10.4.6)

This is for a Mac that won't sleep.
First, read things in Apple doc.#25801 on sleep settings.
USB devices and hubs often cause Macs to not sleep or wake quickly from sleep (notably HP printers and scanners, HP all in ones, and Cannon scanners). Disconnect all USB except for keyboard and mouse and try. If it sleeps, add one back at a time testing after each one to find the culprit.
If you've set your Mac to recieve faxes, it may not be able to sleep. It might also have a damaged preferences file.
If you use your Mac for faxing, open System Preferences. click Print & Fax, click the Faxing tab, and uncheck the Recieve Faxes On This Computer box.
If that does'nt work or you've never faxed on your Mac, go to Finder/Hard Drive /Library/Preferences/SystemConfiguration and delete the com.apple.PowerManagement.plist and com..apple.AutoWake.plist files (if your Mac asks, type your admin. password).
If the latter file isn't present in the folder, go to user name(probably your name)/Library/Preferences, delete the com.apple.systemuiserver.plist file, and reboot your Mac.
Hope this helps!
P.S. One member here reported this (Michael Gleason);
"I have had this problem with my IMac G5. It is surprisingly irritating. LaCie's Silverkeeper backup software was the cause. By default it gave itself permission to wake up the computer to check if a backup was needed. Do you have this or a similar program installed which has scheduled activities including wake-up permissions as an option?"
Dave Hamilton provided this link, xlr8yourmac.com, to a member, which addresses failure of deep sleep with some users that updated and added new FireWire and USB cards.
tomhorvat adds this; After few days of messing around I found out that I had desktop background (wallpaper) set to change every 1 minute.
After unchecking "Change picture..." in system preferences (under Desktop/Screen saver), my powerbook went to sleep all by itself.
Cheers!
DALE

Mac won't sleep after adding Kensington Wireless Mouse

I've added a Kensington PilotMouse Laser Wireless to my system and now it won't sleep, without first switching off the mouse. Kensington has no info on this, is there a workaround?
PowerMac G4 (Dual 867) Mac OS X (10.4.4)

The "sleep" that you describe is not sleep. Your mac has crashed but since it thinks it is sleeping there is nothing in the crash logs.
Sleep on modern computers is not just a hardware shutdown. Because X and XP are server based kernels they are designed to run 24/7 and do what they can to keep it that way. Deep sleep requires an orderly shut down of processes and loading their status into memory so that when it wakes, all is as it was.
There are many things that can prevent sleep. Usb devices are designed to wake a mac on a change of state (doing something). When my mac did what yours did the only fix for it was an erase and install. I tried all the other solutions but the only one that worked was an erase and install.
If you care to try some of the "fixes" then here are some.
Reset the pmu.
http://docs.info.apple.com/article.html?artnum=95037
• Trash all caches (system and user)
• Mac OS X power management is sensitive to malfunctions in USB devices.
Remove USB peripherals, one at a time
• Mac will not sleep if Applications/processes continuously writing to the Console logs.
Launch Console in Applications/Utilities and check both the console.log and system.log logs for blocks of recurring messages written therein that repeat at high frequency.
Note: the console.log file should open by default when you launch Console.
• Quit System Preferences.... Navigate to ....
/Library/Preferences and delete.....com.apple.AutoWake.plist
Enter your Admin password, when prompted.
•If this does not solve the problem, your Energy Saver preferences may be corrupt.
Navigate to /Library/Preferences/SystemConfiguration (folder) and delete.
com.apple.PowerManagement.plist
com.apple.AutoWake.plist
Enter your Admin password, when prompted.
• and finally....
Navigate to ~/Library/Preferences/ and delete......
com.apple.systemuiserver.plist

Mac won't sleep after 10.8.4 update

After updating osX 10.8.4 Macbook doesn't sleep when closing lid
Thank's in advance

OS X Mountain Lion: If your Mac won't go to or stay in sleep:
http://support.apple.com/kb/PH11080

Mac won't sleep unless Magic Mouse off

Hi
Since getting a Magic Mouse a few days ago I've noticed that my Mac will no longer sleep unless I turn the mouse completely off.
If I put the Mac to sleep it wakes again within a few seconds. At the moment I'm having to sleep the Mac and quickly turn off the mouse before it wakes the Mac.
Is this normal? Have a missed a preference that will prevent this from happening?
Thanks

I have the same problem. I have a three month old iMac and bought a Magic Mouse last week. Since then iMac 'mostly' won't sleep (it will sometimes). At first I thought it was Safari with the new mouse, as closing Safari allowed the iMac to Sleep but now I think it is just the mouse.
I phoned Apple they said uncheck "Put the hard disk(s) to sleep.." in the energy saving preferences but that didn't work. They also said to delete the energy saving settings file from the system library folder but that didn't work.
I am resorting to turning the mouse off now when I am done which is rubbish as it takes ages to reconnect when I want to use the iMac again.
if I plug in my old mouse there are no issues at all. I test sleeping by selectig apple->sleep with the Magic Mouse connected it sleeps and the immediately wakes up again. I've tried changing all the enegry saving preferences with no effect.

MBP Won't Sleep automatically. Sleep light on. Not pulsing. Drive spinning.

I can get my new MBP SR to sleep when I tell it to but it won't sleep when it's supposed to according to my Energy Saver preferences.
Instead of sleeping, the screen goes dark and the sleep light stays on at medium - no pulsing. I can hear the hard drive still spinning. I tried changing my screen saver to one of the original Apple settings (Computer Name) but that didn't help. I'm going to try throwing away my Energy Saver prefs.
Any suggestions?
BTW - I took a closer look and I was a bit surprised at how many posts there are for the MacBook Pro on the Apple.com discussions. The most posts per day of any model by far. I know its a very popular Mac but this model seems to have more problems than we are able to solve. That worries me. Anybody else noticing this?
-Todd

I had exactly the same issue and needed three hours to find out the reason. It was the Bluetooth Mighty Mouse. I had to disselect the *third option* in the *bluetooth preferences*. I have a German-language OS X so I don't know the exactly expression but it affects the ability for bluetooth devices to weak up the system.
If you have EyeTV 2: This application must not be running. If you have scheduled recordings that doesn't matter it will record anyway: It will wake up the Mac - record the thing - go to sleep again.
I have several devices connected to the MBP: Three external enclosures with harddisk drives (2xFW800, 1xUSB without sleep function), EyeTV 610, speakers - all those things did not prevent the system for going to sleep. All those devices can be left attached - up and running. The FW harddisks will go to sleep the USB not.

MacBook Pro won't sleep automatically - no process preventing sleep according to pmset. What's going on?

i noticed the following problem with my MBP 8,1 running 10.7.2 — automatic sleep just doesn’t happen. Since I usually put my Macbook to sleep manually before leaving the desk etc. I just noticed this issue and can’t really pinpoint it to specific updates.
Closing the lid works, selecting “sleep” from the Apple menu works. The only way to put my MBP to sleep automatically is currently PleaseSleep, which works fine.
Here’s pmset -g:
pmset -g
Active Profiles:
Battery Power       1
AC Power        -1*
Currently in use:
standbydelay   4200
standby    0
womp       1
halfdim    1
panicrestart   157680000
hibernatefile /var/vm/sleepimage
sms        1
networkoversleep   0
disksleep 10
sleep      10
hibernatemode 3
ttyskeepawake 1
displaysleep   3
acwake     0
lidwake    1
As you can see, no process is preventing sleep.
Here’s pmset -g assertions:
pmset -g assertions
25.12.11 03:05:34 MEZ
Assertion status system-wide:
   ChargeInhibit                           0
   PreventUserIdleDisplaySleep             0
   PreventUserIdleSystemSleep              0
   NoRealPowerSources_debug                0
   CPUBoundAssertion                       0
   EnableIdleSleep                         1
   PreventSystemSleep                      0
   DisableInflow                           0
   DisableLowPowerBatteryWarnings          0
   ExternalMedia                           0
Kernel Assertions: 0x0004
* Kernel Assertion ID = 500
   Created At = 01.01.70 01:03:17 MEZ
   Modified At = 25.12.11 02:46:14 MEZ
   Owner ID = 0xffffff800b664000
   Level = 255
   Assertions Set = None (4)
* Kernel Assertion ID = 501
   Created At = 01.01.70 01:03:21 MEZ
   Modified At = 01.01.70 01:00:00 MEZ
   Owner ID = 0xffffff800b674000
   Level = 0
   Assertions Set = None (4)
* Kernel Assertion ID = 502
   Created At = 01.01.70 01:05:31 MEZ
   Modified At = 25.12.11 02:38:13 MEZ
   Owner ID = 0xffffff800b704200
   Level = 0
   Assertions Set = None (32)
Any ideas? I tried resetting the SMC, to no avail. Thanks in advance!

here you go -- and thanks again.
Last login: Sun Dec 25 19:24:05 on ttys000
Pavels-MacBook-Pro:~ pavel$ kextstat -kl | awk ' !/com\.apple/ { print $6 $7 } 'Pavels-MacBook-Pro:~ pavel$ sudo launchctl list | sed 1d | awk ' !/0x|apple|com\.vix|edu\.|org\./ { print $3 } '
Password:
com.google.keystone.daemon
com.barebones.textwrangler
com.barebones.authd
Pavels-MacBook-Pro:~ pavel$ launchctl list | sed 1d | awk ' !/0x|apple|edu\.|org\./ { print $3 } '
com.culturedcode.thingshelper
com.google.keystone.root.agent
ws.agile.1PasswordAgent
com.valvesoftware.steamclean
Pavels-MacBook-Pro:~ pavel$ ls -1A {,/}Library/{Ad,Compon,Ex,Fram,In,La,Mail/Bu,P*P,Priv,Qu,Scripti,Servi,Sta}* 2> /dev/null
/Library/Components:
/Library/Extensions:
/Library/Frameworks:
AEProfiling.framework
AERegistration.framework
AudioMixEngine.framework
NyxAudioAnalysis.framework
PluginManager.framework
TSLicense.framework
XSKey.framework
iLifeFaceRecognition.framework
iLifeKit.framework
iLifePageLayout.framework
iLifeSQLAccess.framework
iLifeSlideshow.framework
/Library/Input Methods:
/Library/Internet Plug-Ins:
Disabled Plug-Ins
Flash Player.plugin
Flip4Mac WMV Plugin.plugin
JavaAppletPlugin.plugin
Quartz Composer.webplugin
QuickTime Plugin.plugin
flashplayer.xpt
googletalkbrowserplugin.plugin
iPhotoPhotocast.plugin
npgtpo3dautoplugin.plugin
nsIQTScriptablePlugin.xpt
/Library/LaunchAgents:
com.google.keystone.agent.plist
/Library/LaunchDaemons:
com.apple.aelwriter.plist
com.apple.remotepairtool.plist
com.barebones.authd.plist
com.barebones.textwrangler.plist
com.google.keystone.daemon.plist
/Library/PhonePlugins:
Nokia_5230_isync_plugin_2v0.phoneplugin
/Library/PreferencePanes:
Flash Player.prefPane
Flip4Mac WMV.prefPane
Growl.prefPane
Perian.prefPane
/Library/PrivilegedHelperTools:
com.barebones.authd
com.barebones.textwrangler
/Library/QuickLook:
iWork.qlgenerator
/Library/QuickTime:
AC3MovieImport.component
AppleIntermediateCodec.component
AppleMPEG2Codec.component
Flip4Mac WMV Advanced.component
Flip4Mac WMV Export.component
Flip4Mac WMV Import.component
Google Camera Adapter 0.component
Google Camera Adapter 1.component
Perian.component
/Library/ScriptingAdditions:
/Library/StartupItems:
Library/Address Book Plug-Ins:
.DS_Store
AdiumAddressBookAction_AIM.scpt
AdiumAddressBookAction_ICQ.scpt
AdiumAddressBookAction_Jabber.scpt
AdiumAddressBookAction_MSN.scpt
AdiumAddressBookAction_SMS.scpt
AdiumAddressBookAction_Yahoo.scpt
SkypeABDialer.bundle
SkypeABSMS.bundle
Library/Input Methods:
.localized
Library/Internet Plug-Ins:
.DS_Store
Picasa.plugin
Library/LaunchAgents:
com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.FA1728C5-B917-44F7-90CD-921 9143D5B9B.plist
com.apple.FolderActions.enabled.plist
com.apple.FolderActions.folders.plist
com.valvesoftware.steamclean.plist
ws.agile.1PasswordAgent.plist
Library/PreferencePanes:
.DS_Store
Hazel.prefPane
Library/ScriptingAdditions:
.DS_Store
TextExpander Addition.osax
Library/Services:
.DS_Store
Combine PDF pages.workflow
GraphicConverter.service
Mail selected items.workflow
New PDF from Images.workflow
Resize images.workflow
WordService.service
selected to Bean.workflow
Pavels-MacBook-Pro:~ pavel$

HT1776 Mac won't sleep automatically

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