IMac display won't sleep with hot corner

I saw that this question was asked before but no answer was given. I got my iMac OS X Yosemite 10.10 brand new yesterday. I set up hot corners so that the display will go to sleep when I swipe it. However, no matter how carefully I swipe, it always comes right back on. I cannot get the display to sleep.
What am I doing wrong? Your advice would be appreciated.

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New iMac display won't sleep?

Hi, new iMac 24", 10.5.7, set screen saver at 5 minutes, and display to sleep at 10 minutes. Screen saver works, but it will not sleep. I've changed the setting, and rebooted, still no luck.
I tried everything from suggestions, with no help. I found that if I turn off "screen sharing" in system preferences, it will sleep the display for whatever minutes I set. I have to leave "screen sharing" on because I have flat screen tv hooked up to watch video files on, and I use iPhone app to control screen, to hit play and pause, etc. It is set up with a password, and only my iPhone is used when I am watching something. Why should screen sharing stop display from sleeping? I've left screen sharing on since I got this, so I can remotely log in with "back to my mac" from the road, and it never stopped the display from sleeping before? I shouldn't have to turn off screen sharing just to sleep the display? Am I missing something?

This is for a Mac that won't sleep.
Here is 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 G5 Won't Sleep with USB Hard Drive Attached

I purchased an external USB powered hard drive, connected it, put the computer to sleep, and the computer immediately awoke saying the device was not put away properly.
I then unmounted the drive, put the computer to sleep, and got the same message.
Called Seagate support, and they said it's an OS issue.
Returned the drive.
Bought a Hitachi USB powered hard drive. Exact same thing happens.
Is it not possible to put this machine to sleep when attached to a USB powered hard drive? I had no problem with a powered USB drive.

Every external drive in an enclosure has an on/off switch, read the manual that came with the drive, or ask Hitachi. You seem to have it turned on permanently. If you don't turn it off before unplugging it, of course the computer will complain that it was improperly put away - you need to drag the image of the drive to the Trash to eject it before removing the USB cable or click on eject under File in the Menu bar.

Display won't sleep after being in suspend once.

When rebooting the computer, the display sleeps after set interval and can manually be put to sleep using shift+ctrl+eject.
However if the computer goes to sleep or I myself close the lid to make it sleep, the display won't sleep again.
The display won't sleep after set interval in power settings and when I press shift+ctrl+eject the keyboard backlit turns off but the screen stays on.
The only way to make it sleep is to close the lid.
I have tried resetting SMC and NVRAM but to no avail.
I have the first generation aluminium macbook.
Does anyone else have this problem?
I have had this problem both in 10.6 and 10.8
Regards Robin Hansson

When rebooting the computer, the display sleeps after set interval and can manually be put to sleep using shift+ctrl+eject.
However if the computer goes to sleep or I myself close the lid to make it sleep, the display won't sleep again.
The display won't sleep after set interval in power settings and when I press shift+ctrl+eject the keyboard backlit turns off but the screen stays on.
The only way to make it sleep is to close the lid.
I have tried resetting SMC and NVRAM but to no avail.
I have the first generation aluminium macbook.
Does anyone else have this problem?
I have had this problem both in 10.6 and 10.8
Regards Robin Hansson

Display won't sleep and screen saver won't sart

I upgraded to the new OS and the display won't sleep and screen saver won't come on. Help please.

Long shot.
Do a backup.
Quit the application.
In Finder hold down the option/alt key while selecting the Go menu item. Select Library. Then go to Preferences/com.apple.systempreferences.plist. Move the .plist to your desktop.
Restart the computer, open the application and test. If it works okay, delete the plist from the desktop.
If the application is the same, return the .plist to where you got it from, overwriting the newer ones.
If you want to make your user library permanently visible, run the below command in Applications/Utilities/Terminal.
chflags nohidden ~/Library/
You will need to do that after any updates.

Imac display won't power up or stay on when it does

imac display won't power up or stay on when it does

Have you checked the Energy Saver settings? System Preferences / Energy Saver.
If the settings are what you want, you can try this. Change them to anything at all then change them back to what you want. The restart the computer and reset the 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.

Hot Corners: Display Won't Sleep

I have, for a long time, used hot corners to put my MBP display to sleep. I have things such as backups run while I sleep, so shutting down MBP or hybernation is not an option. Since the last OS update, envying the display sleep hot corner only works for less than a minute before the display wakes. I have had no problems with display sleep on my iMac. Does anyone have a suggestion to a fix? Thanks.
Alice

I'm running the latest OSX, and have the same problem.
The screen saver, or sleep, set in hot corners, only runs for 10secs at best.
Obviously something is disturbing the mouse. Could it be the uneven surface of the desk playing havoc with the laser? I'm not using a mouse pad, just using the desk surface.

Display won't sleep

I have been having trouble getting the display to sleep. When I click the "Sleep Display" app in Dockables, nothing happens. (However, the "Sleep" dockable DOES work.) I have two Hot Corners set up to put the display to sleep. When I go into the hot corner, the display turns off for a second or two, and then comes back on. Usually, if I do the hot corner bit a few times, the display eventually stays asleep. If it matters, I am often running torrents, but I'm pretty sure this problem has happened without any torrents running. To test this, I just paused all torrents. The Sleep Display dockable did not work, but the hot corner did.
So, are the torrents my problem, or could there be something else keeping the display awake?

First, the version of Dockables I have came with the machine (as did Snow Leopard), so it should be the right version.]
However, it was 1.1, so I downloaded the new version. It works better, but I still had to click it twice for the display to STAY asleep. And even if my version of Dockables was out of date, I also had the problem using the hot corners, so I believe there is still something in the system keeping the display from staying asleep unless I make two or three attempts.
To test things again, I just set up the bottom right corner to start my screen saver. That worked fine - the screen saver came on and stayed on. But when I tried the bottom left, which is supposed to sleep the display, the display came back on after going off for just a second.
Probably not relevant, but I used Dockables successfully on my previous PowerPC G5.
George

External display won't sleep

I just purchased an NEC PA271 27" LCD display for my Mac Pro. It's beautiful, clear and sharp, but there's one problem: it won't sleep.
When I put the computer to sleep or shut it down, the monitor doesn't go into sleep mode. The blue LED on the front is supposed to turn amber, indicating sleep, but it doesn't.
I've tried resetting the SMC and PRAM, as well as repairing permissions, to no avail.
Any ideas?

I should also mention that I didn't have any problems with my ACD 23" previously, so it would seem to be an issue with this particular display and how it communicates with my Mac Pro.

MacBook Pro won't sleep with external monitor

Hello,
have a problem. I'm using external monitor with my MacBook Pro. If I close the lid, I see all windows on external monitor and Yosemite won't sleep. Can you help me please? My external monitor is Samsung 21.5" and I'm connecting it to MacBook Pro via DVI.
Thank you

Hey Renecek,
My first thought was, "Hey, you are using closed-clamshell mode".
How to use your Mac notebook computer in closed-clamshell (display closed) mode with an external display - Apple Support
But then I realized, wait, you want it to sleep.
For that, check out the suggestions in these articles.
OS X Yosemite: If your Mac won’t go to or stay in sleep
OS X: When your Mac doesn't sleep or wake - Apple Support
Take care,
Nubz

Laptop display won't sleep

I just upgraded from 10.3.9 to 10.4.8, and I’m almost completely satisfied except for one last thing: I play a MMORPG that runs in full-screen mode, and when I was running 10.3.9, the display eventually became dim and shut down after several minutes in accordance with my preferences in Energy Saver. This is not happening in 10.4.8. What do I do? I jiggered my screensaver and display-sleep times, but this hasn’t worked. Thanks very much. Peace.
PS, how do I get file sizes to display when I do a search in the upper right-hand corner of a finder window like I used to?

I meant to say, there are times that one leaves the game running while one leaves the computer for hours at a time, and the display eventually dimmed and went to sleep while the game was running in full-screen mode. Anyway, the laptop display isn't sleeping since I upgraded to 10.4.8 from 10.3.9, so how should I set my preferences? Peace.

When I'm on a Skype, Mac Air display won't sleep?

I often have a Skype call connected as my boyfriend and I are having a long distance. The display would sleep when I was having a call and out of the room when I was using OS X 10.6.8
but since I've changed to use mountain Lion 10.8.2, It won't sleep.......
I think its hurting my display for keeping a long time on.
What's the problem?

I've already unchecked "Wake for Wi-Fi Network Access" but its not working...
but the problem has just happened after I upgraded my OS...
I wont end it... because we r in different time zone so he would like to keep it connected when he's sleeping....
help ><!

Display won't sleep after upgrade to 10.4.4

I ran the update to 10.4.4 today and now my display will not sleep. Since then, I have:
1. Ran the fix permissions utility
2. Restarted, zapped p-ram
3. Deleted the preference file in /Library/Preferences that houses the energy saver configuration, then reconfigured.
Any other ideas? I did not change any of my settings after running the updater and this had been working fine since purchasing the computer.

A number of sleep-related issues can appear after incremental Mac OSX updates, including the inability to properly go to sleep, problems waking from sleep, and having your display go to sleep without your Mac going to sleep. The most common culprit is Bluetooth. Try these tips to fix your sleep problems.
WAKE UP
In System Preferences>Bluetooth, uncheck Allow Bluetooth Devices To Wake This Computer. If you are using a Bluetooth mouse and keyboard, you'll have to wake your Mac by pressing the power button.
FILE CORRUPTION
Your Bluetooth preference file may be corrupt-you'll need to delete it. Turn Bluetooth off, then go to the /Users/user name/Library/Preferences folder. Look for a file called com.apple.Bluetooth.plist and trash it.The OS will create a new preference file when you enable Bluetooth again.
ENERGY SAVER
If you have issues with a Mac or display that goes to sleep at inappropriate times, you may have a problem with Energy Saver. Delete the following .plist files and restart:
-/Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist
-/Users/username/Library/Preferences/com.apple.systemuiserver.plist--(username is your name or System Administrators name).
-/Library/Preferences/SystemConfiguration/com.apple.AutoWake.plist
A restart is very important after deleting these plists. After a reboot your Mac will then generate new ones.
In some cases, running MacOS X's cron tasks-maintenance that the OS performs automatically if you leave your Mac on 24 hours a day-can resolve many sleep problems. If you don't want to leave your Mac on, you can use MacJanitor, Yasu, or OnyX free at Versiontracker.com.
Some, in these forums, have had luck fixing sleep issues downloading the Combo update from this site (yours may be corrupt), not Software Update, disconnect all firewire + USB devices except keyboard + mouse, Repair Permissions, re-install update, Repair Permissions again + try.
Yours would be the 10.4.4 Combo update. Others reading, download the combo update that applies to you!
Cheers!
DALE

10.6 'Spaces' enable with hot corner?

Just optimising my Macbook with various programs and finally come across "spaces" which i've never had time to delve into!
Im on 10.6.4 and wondered (as im so used to expose') whether i could get my 4 'Spaces" to show with the mouse going down to the bottom left corner instead of Expose?
Is this possible in Spaces preferences? all i can see is doing it via keys?
Surely you could do this by a hot corner and get all 4 spaces/programs to fill the screen in a grid so i can easily switch between them? (and probably disable the corner in Expose?)

Answered!

MBP 17" 2.8 dual core won't sleep-gets hot

my new unibody wont go to sleep these days, I close the lid and come back to find it really hot. sitting on my desk or carried in my bag, I'm scared it will do permanent damage.
doing a little search, it seems a few people are having this problem.
Apple, can you please fix this pronto!?

Meaning MacMall doesn't accept returns on Apple products. If it has a problem, like mine, you have to go to Apple to get it fixed. You can't send it back for a new one.
Update- I just erased and installed and the problems are still there. It won't sleep manually, (will by itself but then screen won't wake) it won't shutdown and it hangs at restart. Hard reboot is my only option right now because no one here seems to have a solution so I guess I'm calling Apple.

IMac display won't sleep with hot corner

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