Random Sleep/ Won't wake up

Since installing 10.4.6, my computer goes to sleep after being on 15 minutes, sooner if I use a memory intensive program. Then, when I try and wake it up, it immediately goes back to sleep mode? Is this Tiger or my computer? Any ideas?

I'm afraid it sounds like your computer - a failing Power Supply Unit. If you have AppleCare, I would call them and arrange to take your computer in and have it checked out before the problem gets worse.
Please post back and let us know how you made out,
Miriam

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Sleep - won't wake up, and now randomly goes off to sleep

Since the recent security update, my 1.67 G4 Powerbook has been experiencing problems with sleep. Sometimes it won't wake from sleep, forcing me to hard reboot or pull all power out, and now it's randomly falling into sleep when it shouldn't.
The issue is progressive - it will sleep, then I wake it, then it goes down again 2-3 minutes later, wake, then seconds, wake, then deep somnambulistic slumber.
I read in Macintouch that there was a fix recently for Intel MacBooks and sleep, but some of us in the PPC world are feeling it's effect.
I've reset the pram several times, and on one occasion the fan spun up very loudly on boot, then quieted down after 5 seconds. Might be nothing.
Another factor is the battery - pull the battery and the system behaves better. I wonder if there's a lowered thermal limit that, when the battery is charging, causes the system to shut to sleep...?
Anyone else having this problem? I'm ready to slip back to 10.4.9 to see if that makes it more stable -- this happens several time a day now.

For other who may be watching this...
The laptop did keep shutting down into sleep, but - following from a tip from another site - I began trying three things: One or all seem to have resolved the issue:
* Repair permissions - often and always. Something does get munged and I'd be interested to see if anyone else has the same files affected:
Permissions differ on ./Library/Widgets, should be drwxr-xr-x , they are drwxrwxr-x
Owner and group corrected on ./Library/Widgets
Permissions corrected on ./Library/Widgets
Group differs on ./usr/bin/fetchmail, should be 0, group is 6
Permissions differ on ./usr/bin/fetchmail, should be -rwxr-xr-x , they are -rwxr-sr-x
Owner and group corrected on ./usr/bin/fetchmail
Permissions corrected on ./usr/bin/fetchmail
Permissions differ on ./usr/lib/php/build/Makefile.global, should be -r--r--r-- , they are -r-xr-xr-x
Owner and group corrected on ./usr/lib/php/build/Makefile.global
Permissions corrected on ./usr/lib/php/build/Makefile.global
Permissions differ on ./usr/lib/php/build/acinclude.m4, should be -r--r--r-- , they are -r-xr-xr-x
Owner and group corrected on ./usr/lib/php/build/acinclude.m4
Permissions corrected on ./usr/lib/php/build/acinclude.m4
Permissions differ on ./usr/lib/php/build/mkdep.awk, should be -r--r--r-- , they are -r-xr-xr-x
Owner and group corrected on ./usr/lib/php/build/mkdep.awk
Permissions corrected on ./usr/lib/php/build/mkdep.awk
Permissions differ on ./usr/lib/php/build/phpize.m4, should be -r--r--r-- , they are -r-xr-xr-x
Owner and group corrected on ./usr/lib/php/build/phpize.m4
Permissions corrected on ./usr/lib/php/build/phpize.m4
Permissions differ on ./usr/lib/php/build/scanmakefilein.awk, should be -r--r--r-- , they are -r-xr-xr-x
Owner and group corrected on ./usr/lib/php/build/scanmakefilein.awk
Permissions corrected on ./usr/lib/php/build/scanmakefilein.awk
Permissions differ on ./usr/lib/system/libmathCommon.A.dylib, should be -r-xr-xr-x , they are -rwxr-xr-x
Owner and group corrected on ./usr/lib/system/libmathCommon.A.dylib
Permissions corrected on ./usr/lib/system/libmathCommon.A.dylib
The privileges have been verified or repaired on the selected volume
Verify/repair finished permissions on disk disk0s3 Macintosh HD
* I stopped zapping the PRAM when it went to sleep or wouldn't stay awake on boot - I just booted from DVD instead and, lo and behold, the thermal errors didn't occur under the DVD. Fixed permissions and a reboot it often worked fine for hours.
* Running it alternatively from either battery or from mains. Initially under the battery, it would sleep at 70-60%, then - after a few days of being shut down instead of slept - it began running down to 0. I'd have to plug the unit in and charge it whilst off, but now -- after a week of this - everythings back to normal.
Ultimately, I'm sure this software. Something is up - and slowly, if you're patient, you can bring your system back without buying a new case or motherboard.

IMac 2011 screen unexpectedly goes black (to sleep), won't wake

I've been having an intermittent problem. I'm using an iMac (late 2011) with 10.7.3. I'm doing things on the computer or some process is going on when the screen instantly goes black (no dimming first). If a video was playing, I can still hear it playing, but pushing keys on the keyboard or mouse or pad does nothing to wake the screen. Sometimes pushing the power button a number of times will get the screen to come on, sometimes it won't. When the screen goes black, if an external drive was running and then stops, I can sometimes get the screen to come to live. Sometimes this black screen happens when I'm burning a DVD; when the DVD is finished, I can bring the screen to life. I thought one of my two external drives was bad, so I disconnected it. That seemed to help (though verifying the disk revealed no problems). But a few minutes ago, the screen instantly went black again; no dimming first. There have been times I thought this was associated with a new bit of software, but then it returns even after I delete the suspect software. Sometimes I have to use the power button to shut down the iMac then restart it. Once, I had to unplug and replug the iMac before I could get the computer to respond and the screen to return to life. I don't know if this is a hardware problem (internal or external), a software problem, or some combination...or something I haven't thought of, at all. Very annoying. Verified the internal drive, repaired permissions; no problems noted there.

Exactly the same issue here - same machine and OS. got so bad now that it blacks almost as soon as it comes on. Over the past few weeks I also experienced the flickering screen that others have complained about. The black screen only occured after installing latest update (7.3) - and I only installed this after earlier problems with the update reported by many users were sorted - but the flickering happened before so may be not relevant.
What's happening when you press the power button a couple of times is probably that you have 'use power button to put computer to sleep' selected in System Prefs. Henmce, 1 push puts it to sleep and 2nd wakes it up.
I have done all the usual checks plus power down, unplugged for 20 seconds and then restarted to reset the SMC (System Managemenmt Controller) but problem has recurred - normally after sleep.
Aplle did have a large batch of faulty LG screens apparently so maybe this is the poblem. Otherwise maybe graphics card issue,
Mine's off to a service centre tomorrow whilst it's still under warranty... will update when I get it back

MBP goes to sleep, won't wake up!?!?

Recently my MacBook Pro has began going to sleep, either after not being used or after I shut it, and then it won't wake up and has to be restarted manually, which costs me data, time, etc.
I've researched the problem, but haven't seen anything that sounded exactly like what I am going through.
Plus I'm not the best at fixing stuff myself (lets just say I'm not going to get hired as a MacGenius anytime soon).
Help me! I'm writing my National Board Papers right now and need my machine to be reliable!!!
Thanks in advance.

I have just started having the same problem. I used to be able to use the MBP for a few minutes, leave it on the table and let it go to sleep. Come back anytime and it would wake. Now it won't, and I have to go back and plug it in to get it to wake. I have just now noticed that the battery is almost drained. I used to be able to do this for a couple of days without charging, and now it won't make it 12 hours.
The battery being almost drained would explain the no wake, but now the question is why it is draining so quickly even in sleep mode. Especially when I used to tell everyone how great the MBP is, and how long the battery lasts and how quick is starts up. Of course I was telling this to all my co-workers where we are stuck with the company issued Dell.
I think this may have all started after upgrading to 10.5 or iLife08, as those are the only two programs that have recently been added.

Mac air goes into sleep won't wake

MacBook Air goes to sleep as normal, but won't wake up now.

A new mini is on the way & I'm researching UPS's. A question that I now have is -
The new mini will have 10.5 which will be nice, but I really want to put my old hard drive straight into the new unit so I can have my old computer back the way I like it. Right now I have my external drive with everything on it plugged into my wifes macbook, & I can access everything except my email. The old emails are there in the folders, but as numbered icons, & I can't find anything. With my business I often have to refer back to old emails, & right now it's really hard to. I have tried to import them into mail, but it says it doesn't recognize them.
If I do this, can I put the new backup discs in & load leopard onto the old hard drive without loosing my old information & setup? We are on a very slow dial-up here, so I've never been able to accept the automatic updates. I look forward your advice.

Put to Sleep - Won't Wake Up!

The last two times I put the iMac to sleep, it would not start up the next morning. As per Apple's instructions, I removed the back cover and was able to re-start using the internal power supply button. After the second time, I just stopped putting it to sleep and it has been fine. But obviously I'd like to know what the problem is. My computer is one of the models covered by the extended warranty for faulty logic boards. Is this definitely the problem or could it be something else - and is there any way to find out on my own? Thanks!

Here's something you could try;
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 line:
reset-nvram
press the return key on your 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

Won't sleep, won't wake

I'm having two problems with sleep mode:
WON'T SLEEP
my iMac G5 won't sleep even though sleep mode is activated in Energy Save preference pane (file sharing off).
WON'T WAKE
When I put my machine to sleep at night (sleep item under apple menu), it won't wake up in the morning. The blinking sleep light indicates my iMac is in sleep mode. I hit a key to wake it. The sleep light turns off. Nothing else: no noise, no screen but the black on. I wait a few minutes and press the power button: nothing happens. Once it starts up after a hard boot (power button, 5 secons). Most of the time I have to wait an hour or two and then I can start up my machine by pushing the power button.
This problem occured yesterday for the first time. Today I did many test with same results: no wake after "manual" sleep mode and no "automatic" sleep.
Note: Apple Hardware Test did not detected any problem.

Even though the hardware test did not indicate a problem, you may still have one. I'd give AppleCare a call. Also note, if you are out of the one year or AppleCare coverage, you may still qualify for this program:
http://www.apple.com/ca/support/imac/repairextensionprogram/

Retina goes to Sleep won't Wake

So i have a late 2012 Retina. It recently has been going to sleep and then failing to wake up when i open the lid or touch the keyboard. I have Reset the SMC by holding Shift+Option+CTL and the power button when the system was off. This seems to work because the power cord blinks when i do it. Sadly that has not solved the problem. I have tired of doing a hard reset by holding down the power button. I don't like doing that i feel like its not healthy for the computer. I did a reinstall of the OS and that solved the problem for a little while, but then it returned. I am planning on doing a full clean install of OS X Mavericks but if i don't have too i don't want too. So again it goes to sleep then it doesn't wake so i hold power reset and then start again. I need to trust my ststem is going to wake up. Sending it back to Apple is not an option.

I have just started having the same problem. I used to be able to use the MBP for a few minutes, leave it on the table and let it go to sleep. Come back anytime and it would wake. Now it won't, and I have to go back and plug it in to get it to wake. I have just now noticed that the battery is almost drained. I used to be able to do this for a couple of days without charging, and now it won't make it 12 hours.
The battery being almost drained would explain the no wake, but now the question is why it is draining so quickly even in sleep mode. Especially when I used to tell everyone how great the MBP is, and how long the battery lasts and how quick is starts up. Of course I was telling this to all my co-workers where we are stuck with the company issued Dell.
I think this may have all started after upgrading to 10.5 or iLife08, as those are the only two programs that have recently been added.

IMac goes to sleep; won't wake up

After burning my first DVD I noticed the iMac goes to sleep, the light pulsating for a few moments then it disappears (screen is still dark) and it will not wake by touching keyboard or moving the mouse. (I had to unplug it and hit start-up button to get iMac back up & running).
It seems to run fine except for this sleep issue. I can re-awake it at the stage where the screen saver is still on; after that it's in a coma. I have deleted the com.apple.systemuiserver.plist file (suggested by Dale in another post).
I know I can set the computer to "Never" go to sleep but is that a viable option? And, may this sleep problem be a symptom showing some problem exists w/ the power supply or the logic board as I've seen described in other posts. i.e. Should I be calling in the Apple Care people to diagnose my comatose Mac?

I called Apple Care; the tech ran through a process involving unplugging all peripherals, etc etc; the end result being that my iMac is diagnosed w/ a power supply issue. It will qualify to be repaired under the iMac G5 Repair Extension Plan, free of charge. (My iMac also needed a logic board to be replaced 6 months after purchase in Jan. 2005.) My advice: don't purchase the "first generation" of a product line; too often the kinks haven't yet been worked out. If you must make such a purchase, buy the extended warranty (the ProCare plan) and protect your investment.

IMac 27in (Mid 2010) Lion - WiFi Drops on Sleep / Won't Wake on LAN

Subject says it all. As soon as I upgraded to Lion, I began noticing that when my iMac wakes from sleep, it's not connected to WiFi. It does automatically connect itself after about 60 seconds, but I get the popup box showing me all the nearby networks, and always have to hit cancel. I use only WiFi for this mac - no ethernet connection.
Annoying, but when I recently bought an Apple TV, I found that I can't connect to iTunes on the iMac if it's sleeping. I have to walk upstairs and wake the iMac up each time. Sort of defeats the main reason I bought the Apple TV - so I could bring up iTunes in the living room and listen to my music remotely.
I know many of you have this same issue, and it looks like it's been going on for a very long time. Several updates have been released, but none fix this issue. Researching this has grown very tiresome. Most suggested fixes aren't real fixes for, what has to be, a OS software issue and seem like wild goose chases. Everything was fine with Snow Leopard.
Posting this just on the off chance that I have missed a real fix.

If you're running OS X 10.8.5 or earlier, then from the menu bar, select
 ▹ System Preferences... ▹ Accessibility
If the checkbox at the bottom marked
Enable access for assistive devices
is checked, uncheck it and test.
If you're running OS X 10.9 or later, select
 ▹ System Preferences... ▹ Security & Privacy ▹ Privacy ▹ Accessibility
If any applications are listed on the right and have a checked box next to them, uncheck all the boxes and test. You may first have to click the padlock icon in the lower left corner of the window and authenticate as an administrator to unlock the settings.

ATI Radeon 300 Monitor goes to sleep - won't wake up.

I have Windows 7 running on a system that has an ATI Radeon 300 based video card. The card has two monitor connectors, VGA and DVI. I am using two monitors, Number 1 is a 19" 16:9 monitor connected to the DVI, Number 2 is a 15" 4:3 monitor connected to the VGA port. The primary monitor (with the Task Bar) is Number 1, DVI, 16:9.
Here's what happens. When I leave my Windows 7 computer the monitors go to sleep. When I come back to do some more work, and I move the mouse, only display Number 2 wakes up! I can move the mouse around and Display 2, the 15" 4:3 monitor on the VGA works great, but the main display connected to the DVI will not wake up. I have to do a shut down using the power button on the front of the computer!
Weird, huh? Any clues? I do like to have my computer monitors turn themselves off when not in use.
Thanks if anyone can help. I'm using the video drivers that installed with Windows 7.

Hi PhilBiker,
It seems that your ATI Radeon 300 based video card is a little bit old. Since one of your monitor (15" 4:3 monitor on the VGA) can wake up properly, we can conclude the Power Settings are configured correctly and this issue can occur because the device driver you currently use cannot support yours 19" 16:9 monitor on the DVI very well or Monitor Configuration is not set normally.
After checking the official documentation on ATI support link, you can see
"Note: AMD’s DirectX 9 ATI Radeon graphics accelerators are not officially supported under Windows 7. If the user chooses to, they can install the ATI Catalyst Windows Vista graphics driver under Windows 7. Please be aware that none of the new Windows 7 graphics driver (WDDM 1.1) features are supported (as the Windows Vista level graphics driver is limited to WDDM 1.0 level support). Using the ATI Catalyst Windows Vista driver under Windows 7 is not officially supported by AMD, and as such AMD will not provide any form of customer support for users running in this configuration”
Reference: ATI Catalyst™ Display Driver
Radeon™ X300 Graphics Technology - Versatility and Performance at a Value Price
As suggested, you can try installing Windows Vista driver in Windows 7 to check if the issue can be resolved.
1. Right-click the exe. file and choose Properties.
2. Under the Compatibility tab, please check the "Run this program in compatibility mode for" and choose "Windows Vista".
3. Check the box before “Run this program as an Administrator” below.
4. Click OK to save the settings.
5. Follow the instruction to install the driver, and test.
After that, if the issue persists, please do the following test and let me know the results.
1. Disconnect the 15” monitor and only connect the 19” monitor, put the computer to sleep, then resume it to see if the 19” monitor can resume normally.
2. Set the 15” monitor as the primary display and set the 19” monitor as the external display to test.
Judy :)

Start up drive goes to sleep, won't wake up

I added a second internal drive (SATA) Maxtor 6V250F0 250gb and have made it my start up drive. The problem is, every now and then the drive goes into sleep mode. (The computer itself has not gone to sleep. As often as not, I simply reading a website or whatever.) This leads to spinning beach ball city as applications stop responding. The only way to recover is to do a hard shut down using the power button and restart.
I have tried unchecking "Put the hard disk(s) to sleep when possible" in the Energy Saver control panel, but it still happens.
Possibly related: If I put the machine to sleep manually, when I wake it up, the start up drive acts as if it is read-only. Again, only a restart can correct it.
Also possibly related: The old start up drive can not be unmounted either in the Finder or in Disk Utility. As a result, I can't erase it with Disk Utility. (I realize I could probably get around this by starting up from the Tiger DVD, but I'm more concerned about the new start up drive problems.)

Having the same problem. 74GB raptor boot drive becomes read only after idle

Computer goes to sleep won't wake up

I have given a laptop to an elderly parent so that she can surf. For several weeks now, at some point in the day the laptop goes black (to sleep?) and the slowly blinking white light bottom right glows steadily. Tapping the track pad or any key does not bring up the desktop. I have tried draining the battery and re-charging, changing System Preferences under Energy Saver for the display and computer to never sleep, cleaned up permissions with Disk Utility. That's about the extent of it, the computer shuts down every day I suspect at the same time but have no way to check.
This is a MacBook Pro 15" around4 years old? 2.53 GHz Intel Core i5 4GB Memory, 1067 Mhz DDR3. FWIW, the only non-native program is an application to run a signal antenna to connect her laptop wirelessly to my network. Generally the laptop is run connected to power, and I don't believe it makes any difference whether the laptop is left open or shut.
Appreciate any help you can give!

This isn't a fix, more a workaround I used when I had wake from sleep problems that lasted from some point in 10.6.x, through 10.7 and into 10.8 (got fixed for me in 10.8.2). It seems to be connected with Bluetooth failing to wake up properly:
System Preferences>Energy Saver and set 'computer sleep' to 'never'.

Cinema Display Sleep Won't Wake on Mouse Move

After the Cinema display sleeps (MBP is still awake), prior to Lion, I would just move the mouse and the display would wake. With Lion, moving the mouse has no effect, and I have to open the MBP to wake the Cinema display.
I use an external monitor, keyboard, and wireless mouse.

I am having the same problem on my MacPro after upgrading to Lion. I had this problem with Leopard originally, and the solution involved resetting the SMC and resetting PRAM. However, those tricks did not work with Lion. Once the display goes to sleep, it will not wake up. The computer itself is fine (configured to never sleep). I can ssh into for example. I note that an attempt to reboot with "sudo shutdown -r now" fails to reboot successfully however and I end up having to powercycle in order to recover my displays. For now, I'm just going to set my "Display sleep" Energy Saver preference to Never to avoid the issue.
For my MacPro: resetting SMC involves:
a) unplug power for 15 seconds
b) plug in power and wait 15 seconds
c) boot
For my MacPro, resetting PRAM involves:
a) When turning on power, hold down command, option, P, and R keys. wait for 2nd beep to indicate PRAM is reset, then release keys

Automatic sleep - won't wake up

My energy save settings apparently caused the G5 dual processor to SLEEP. Nothing would wake it up. Even the on/off button would not turn off the machine or turn it back on. Had to UNPLUG it and restart.
In System Preferences, most screens work. The one that doesn't is the one controlling the displays. I tried to turn off the hot corners and the Beach Ball of Death appeared.
I only got rid of the screen by FORCE QUIT of the preferences program.
I've turned off all energy saver settings.
Is there any other solution?

My energy save settings apparently caused the G5 dual processor to SLEEP. Nothing would wake it up. Even the on/off button would not turn off the machine or turn it back on. Had to UNPLUG it and restart.
In System Preferences, most screens work. The one that doesn't is the one controlling the displays. I tried to turn off the hot corners and the Beach Ball of Death appeared.
I only got rid of the screen by FORCE QUIT of the preferences program.
I've turned off all energy saver settings.
Is there any other solution?

Random Sleep/ Won't wake up

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