Imac not going to sleep?

For some reason, my imac fails to go to sleep. I must do it manually. I checked the power settings and all seems ok.

Any external devices connected to the iMac (harddisks, scanner, iPhones, Elgato TV, etc.) and not ejected/disconnected ?
Stefan

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HT1776 Hi, my iMac screen goes to sleep but the fan stays on 24hrs and never stops?

Hi, my iMac screen goes to sleep but the fan stays on 24hrs and never stops? You can hear it running all night.
Appreciate any advice.I'm using Lion. Many problems started since using Lion!

The temps are a bit higher than I'd expect under normal circumstances, and too high while playing games, but what is the room temp where it is?
I def. think its a temp thing now. but why does it only raise when im playing games or watching videos online?
Games tipically press the CPU, Video Card, RAM, and everything else much harder than most apps.
It may be a Fan not working properly, or just dust buildup.
Boot off your Install Disk while holding down the *d key*, (not c key), then run the extended Apple Hardware Test. Some disks require you to use the Option key at bootup to select AHT. Some models have a separate AHT CD.
Report any errors it finds.

How do I stop iMac from going to sleep automatically after 15minutes of inactivity

How do I stop imac from shutting down automatically after 15minutes of inactivity, trying to play music but the imac keeps going to sleep, tried changing power saving preferences to never shut down, never go to sleep, unticked put the hard disks to sleep, automatically reduce brightness, but still goes to sleep.

Try a PRAM/NVRAM reset.
Resetting NVRAM / PRAM
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
After resetting NVRAM or PRAM, you may need to reconfigure your settings for speaker volume, screen resolution, startup disk selection, and time zone information. If issues persist, your Mac's logic board battery may need to be replaced. The logic board battery helps retain NVRAM/PRAM settings when your computer is shut down. You can take your Mac to a Mac Genius or Apple Authorized Service Provider to replace the battery on the logic board.

Computer not going to sleep when lid closed

My wife's new MacBook Air has a couple of problems we can't figure out. First sometimes the computer is not going to sleep when lid is closed and when we lift the lid everything is frozen.
Second, the user Library folder is not seeable in her user account. I know it's there because on the side bar there's a short cut to Preferences folder which we can open.
Strange behavior.
Thanks,
Ron

Ron,
The user library folder (~/Library/) is hidden by default in Lion. I assume Apple doesn't want people mucking around with the sensitive files in there. So this is normal behavior.
As for the freezing issue, I would suggest you reset your power management and perform a safe boot to clear out caches. You should also see if the issue persists after disconnecting USB perhipherals.
Here's how:
Power Management:
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
Safe Boot:
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).

MBP not going to sleep

I have had my MacBook Pro for a little over a week now and i am noticing that it is not going to sleep according to my energy saver preferences, or at all for that matter. Any ideas?

Something must be preventing it going into the appropriate sleep mode; either some software running or a lack of space for the sleepimage file (most unlikely at this point). Run /Utilities/Console, click 'All Messages' top left and then select Sleep from the Apple menu top left - there should be some lines in the Console Log that will give a clue about what's going on (post them here if you like).

IPod not going to sleep correctly

Hi there,
I am having an issue with my iPod 5G not going to sleep correctly. When I select the "Sleep" function on the menu screen the iPod with stop responding to the wheel, as per normal, BUT the screen only fades and does not blank itself completely. I can still see the menu items.
Is this right? I though the screen blanks completely, to save on battery power.
Advice and thoughts needed...cheers
iPod 30Gb 5G Windows XP

Hi, I have managed to change the battery of my Ipod
mini, but still after the Ipod is fully charged the
battery life still lasts only a few hours....
My assumption after reading all the technical
documents, is that even though the Ipod mini appears
to go to sleep (either by itself or after the play /
pause) button is pressed for a few seconds, that in
fact the Ipod isn't a sleep and the battery runs
down....
I have updated to the latest 1.4.1. software... only
recently happened, and replaced the battery (but
perhaps it didn't need it).
And it's 14 months old so out of warranty...
Does anyone know of issues with sleep mode not
working correctly? Is there a software fix for
this????
Cheers
I think I'm having the same problem - let me know if you find an answer and likewise I'll do the same. Is going to sleep the same as turning off? Mine doesn't even turn off when I press down the play/pause button!

Computer not going to sleep when scheduled

FOr some reason the last couple days my system is not going to sleep even though its scheduled to in energy saver. Nothing has changed except the last update earlier this week.

Have a look at > Mac OS X: Why your Mac might not sleep or stay in sleep mode

MacBook not going to sleep when connected to WiFi

Hi there,
my MacBook 3,1 is not going to sleep as long as it is connected to WiFi.
It starts the process of going to sleep as my VNC connection gets dropped but it stays awake. I can easily reconnect.
Everthing else is working fine. Any suggestions?

Hello everyone,
I'm facing the same syptom. I tried many things and now havw to live with putting the MacBook to slee by hand. I had some other issues just before that:
1: The MB returned randomly from sleep while being closed. That was annoying. I think it was fixed after installing smart sleep and doing some cleanup in the preference files.
2: Then I was put "randomly" to sleep. I figured that came from overheating the processor (thus I'm gld it went to sleep). The fan speed control was set to constantly 2000 rpm. Installing fanControl helped.
3: Lid closing did not init the sleep mode and the backlight is not turning off. Niether does it wake up on opening when I put it io sleep manually (I have to press a key).
The sensor for closing the lid seems to work, if it is the same which controls the maximum brightnes of the sleep indicator light (pulsing). It is darker when the lid is closed.
I wonder if there is some settings tool.
Besides I think the issues started after the Software updates around 12th of dec. 2008, with MacOS10.5.6 and the EFI & SMC firmware updates.
I'm eager to get answers.
Kid regards, Ralf.

External hard drives not going to sleep

External HDs (I have two) connected to my 2.26 unibody macbook are not going to sleep even though I have the appropriate check box selected in System Prefs. Running 10.6.8. Connected through the USB ports in my 23" cinema display. Any thoughts or suggestions?

Lion may not be able to put them to sleep (as it can internal drives). The drives often come with drive management software to do that (check that it is Mac OS compatible). I have two Segate drives that backup my server and then sleep, but that is managed by the managment software.
DB

Just Updated to 10.5.2 on Feb 10, 2008, Display not going to sleep anymore

Greetings:
I am running on a Macintosh G4 Graphite (which has been heavily upgraded to a G4 1.8 Ghz processor (Sonnet Tech Encore) and it has 1 GB RAM and an upgraded ATI Radeon 9200 Mac Edition video card). Under 10.4 -10.5.1 everything worked fine.
I have my Power management settings set to put the display to sleep every 30 mintues and changed to 3 mins to check if something else was up.. but the display is definitely NOT going to sleep any more.
Any thoughts and is anyone else having this issue?
I have not yet trashed the preferences file, mainly because I am not sure where it lives.
Thanks,
Mike

Hello All Again:
Just wanted to update you on how I fixed the problem. Not sure what specifically in the combination fixed it, but it does now work
First I opened System Prefs > Energy Saver and hit the set to defaults button. I then exited System Prefs.
I then went into Terminal and ran pmset displaysleep 30 and exited terminal.
Lastly, I went into System Prefs > Energy Saver and selected 3 minutes. Exited System Prefs and waited and lo and behold it worked. So I rebooted my system and then set the timer back to 30 mins and it has been working again so far.
I suspect that the pmset from terminal may have refreshed something in the prefs file someplace, but again it was just something in that string of things I did that worked.

Computer hanging on closing lid and not going to sleep, indicator does not blink

i have a 1 month old Macbook Pro 13" i5 with 4Gb memory.
when i am closing the lid the computer is not going to sleep, hard drive continues to spin and power indicator does not blink and it remains solid.
on opening the lid again screen keep blank and does not show anything while i can hear spinning of hard drive. than i have to forcefully shut off the computer by pressing power key and than computer starts after that.
Apple support told me to press shift+control+option+power and than start computer, it fixed the problem only once and they told me to do it again when it comes again. but write now i am getting it everytime.

Hi guys -
First off make sure you don't have 'Wake for ethernet access...' enabled in System Preferences/Energy Saver/Options - I'd also run Disc Utility and repair your permissions as well. OS X requires 'maintenance routines' to be performed on a certain basis and you can use this free application to help you with that...Onyx.
Check the obvious as well - that you don't have any applications that might keep your Macbook awake ...some printer utilities do this for example.
After all this shut down and restart and hopefully things will be better - if not, there may be a chance that the mechanical parts that put your computer to sleep may be at fault ...and you'll need to visit an Apple dealer to verify this.
Hope some of this helps.
Macbook 1.8-) Mac OS X (10.4.8) Week 38 base model w/1G Ram

PC is not going to sleep or shut down after upgrade to Windows10

Hello,I upgraded my laptop from win 8.1 to win 10.Now when I close the lid or press the power button, the computer turns the screen off, turns the WIFI off, no more hard disk activity but it is not going to sleep.Also when I shut it down it goes throught the same procedure but never turns off.To start again, I have to keep pressing the power button to turn it off, then turn it on again.I did the powercfg - energy and got this in the report, "USB Suspend:USB Device not Entering Selective Suspend"When the computer had just started, I don't get that message, it also goes to sleep and shuts down normally, while later, I get this message in the report and no longer sleeps or shuts down.Any suggestion ??Thanks

Hi ,
Thank you for visiting the HP Forums! A great place where you can find solutions for your issues with help from the community!
I came across your post about the Notebook, and wanted to assist you! I have looked into your issue about your HP Pavilion 15 Notebook and issues with sleep or shut down after upgrade to Windows 10. Try using the Windows Update Troubleshooting tool to fix the problem. Here is a document that shows how to update drivers that are not working correctly with Windows 10. HP has been working closely with Microsoft on the development of Windows 10. I hope this helps. Thanks.

Laptop not going on sleep mode and on shut down light remain on in Windows 10

I have updated Windows 10 in my laptop and after this update from 8.1, my laptop is not going on sleep mode when I put the laptop screen down. Moreover, when I Shut down the laptop, it is almost shut down everything closes except the lights. Light remain on for indefinite time. Then, I have to press the power button for sometime in order to forcely close all the lights. Please give me the solution.

You and loads more peoplehttp://h30434.www3.hp.com/t5/Notebook-Operating-Systems-and-Software/Windows-10-Laptop-won-t-go-into-sleep-mode/td-p/5171069 No 100% fix yet.

Thunderbolt drive not going to sleep when iMac does

Not sure if my title makes sense...
Ok, I have an Intel iMac running the latest version of the O/S
Attached via firewall I have a Lacie external 2big drive
Attached via thunderbolt I have a lacie 2big thunderbolt drive
When the iMac goes to sleep by itself, i.e. I walk away and let the system decide when to sleep, only the firewall connected drive shuts down.
The thunderbolt drive remains live with that nice big blue lamp on the front of the drive remaining lit.
If I manually put the imac to sleep, then both drives shut down. I'd really like both drives to shutdown properly when the system decides I've gone to bed....or gone out or whatever.
Any suggestions?

I have exactly the same problem with three lacie_2big drives. Thay do not go to sleep when my iMac is sleeping. I never had this problem untell using OS X Mavericks. Please help!

IMac randomly goes to sleep / Previous Sleep Cause: -100

iMac (24 inch Early 2009, 2.93 GHz Core 2 Duo, Lion 10.7.3) randomly goes sleep.
No hot corners, never sleep setting.
It seems it goes to sleep more often when CPU is busy and graphic intensive jobs running (videos, gaming).
I cleaned up air ways by vaccume, but it did not help.
Temp monitor showed
CPU 55C
power supply 95C
northbridge 89C
graphic processer goes up to 86C
when it went to sleep for no apparent reason. Are those causing issue? If so what can I do?
/private/var/log/kernel.log says
   "Previous Sleep Cause: -100"
Any idea what this is?
Thanks!

I took the iMac to nearest AppleStore and they opened it and cleaned up inside.
After that, it has not yet gone to random sleep yet while I've been trying to reproduce heavy CPU/GPU load for ~1h (while I could make it happen in 15min this morning).
So far highest temp went down to:
CPU 55C             => 44C
power supply 95C => 72C
northbridge 89C     => 82C
graphic processer 86C => 70C
Tech at AppleStore bar didn't know what Sleep Cause: -100 is.

Imac not going to sleep?

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