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.

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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.

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.

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

HPw2207 Monitor Goes To Sleep & Won't Wake Up

My HPw2207 Wide LCD Monitor goes to sleep and won't come out of the sleep mode. The screen is blank and won't respond. I have to unplug power and reboot the HP Desktop to get the monitor to work again. Once the monitor is timed to sleep the same thing happens and I have to reboot the system again. The computer is an HP-Pavillion d4999t (KC836AV-ABA). I also have an NVIDIA graphics card on the system. This started about a week ago. I checked the cable connection and it appears to be fine. I tried downloading an updated driver for the monitor for Windows 7 from this site but it encounters an error when trying to install. I have set the sleep mode to "Never" for now hoping that this will at least keep the monitor awake in screen saver mode. I need some help.
Thanks,
Bob

Hi:
Thanks for your nterest in the problem. Yes, I have tried pressing both the power button and the spacebar to bring the monitor out of sleep mode. Neither works. The power button is non responsive at this point. Shutting off the monitor and restarting does nothing as well. The only way to get the monitor out of sleep is to disconnect all power and cold start the entire system. However when the monitror goes back into sleep mode the system freezes up again.

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'.

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 :)

IPhone 4 Bluetooth automatically "going to sleep", won't wake up until bluetooth is cycled on/off

Hey guys,
I've had this problem for a while, but just recently it's been getting more and more frustrating.
I have an iPhone 4, and whenever I get into my car, my car will automatically search for the iphone to connect to. Now, normally this is great! Except that, after a few hours of non-use, my iPhone's bluetooth connection will require that I either A. Click on the car's bluetooth profile in the bluetooth menu to "wake up" the bluetooth (which involves the phone automatically cycling bluetooth on and off) or B. Manually turning bluetooth on and off.
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Anyone?

27"iMac (mid 2011) wifi won't wake up from sleep

I have been using my brand new core i7 27" iMac for the last week! And I have noticed a wifi bug that's driving me crazy!
Everytime my iMac goes to sleep when I wake it up the wifi won't detect any networks at all. It's just like if the wireless card is still sleeping! At first I waited for a while because I thought it would take longer to wake up! But it never detected any networks at all.
If I manually turn the wifi Off and then turn it back ON then it detects my network and all the wireless networks around with any problem.
My home router is an Airport Extreme Dual Band !
Is anyone out there having the same issue? or could it be that I got a faulty airport extreme card in my iMac??

Hi Npalamidis,
finally I solved the problem by changing the channel in my router manually - that's all!
I would never have considered so because my iMac late 2007 which was replaced by the new iMac worked at the same place and with the same router without any problems.
By chance I found a general hint to do so in a forum...
However - the story remains strange and if you do not have at least a minimum of computer knowledge you are totally lost!
Hope, you get your problem solved as well!
Greets, Christian

MacBook screen goes gray and won't wake up from sleep - 10.6.2

We have a MacBook Alum running 10.6.2 with 4gb ram.
We recently upgraded to 10.6.2 from Leopard and this issue started to happen.
It seems that as the MacBook goes to sleep or goes to the screensaver mode, the screen goes gray and won't wake up from sleep or screensaver mode without a hard reboot.
Is Apple aware of this issue? It did not happen with the previous version of Leopard. This issue arrived when we upgraded to Snow Leopard. Other than the sleep issue, SL is rock solid. Kudos to Apple for producing a great OS!

Hi GrooveDaddy,
Have you contacted AppleCare via telephone to make them aware of this issue? It definitely doesn't sound like normal behavior. What sort of troubleshooting have you done so far on the issue? What sort of settings do you have on your screen saver? Password protected? Custom iPhoto slideshow?
What if you manually sleep the machine by closing the lid or engaging it via software (via the Apple menu) does the screen have the issue in both scenarios?

My iMac goes into sleep mode, won't come out until I unplug and replug the computer then hit the power button. Just hitting the power button alone won't restart the iMac.

My Imac goes into sleep mode but won't come out. The keyboard/mouse won't rouse it and the power button won't do it either. I have to unplug the computer, re-plug it in and then hit the power button. Help?

I looked around the internet and found an old post that seems to have solved the problem. I had a relatively new USB port (powered) that I unplugged and, ta da, the problem disappeared. I'm not sure why this happens (I'm not a tech person) but it seems like this should have been worked out in testing somewhere.

IMac goes to sleep/hibernate multiple times per day after installing Maverick OS. I have to shutdown and power back on.

iMac goes to sleep/hibernate multiple times per day after installing Maverick OS. Moving the mouse or hitting the spcaebar will not wake the pc.
I have to shutdown and power back on. My iMac was purchased in January 2011 and no longer in warrenty. The energy saver 'sleep' and 'display' settings are set at 10 minutes. When I changed to 'never' the machine got very hot and I changed the settings back. I have checks by: Put hard disk to sleep when possible and wake for network access. Any help would be greatly appreciated.

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a Fusion Drive or a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually login automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.

I have a year old iMac and Macbook, both on 10.7.3. Every time the iMac goes to sleep I lose wi-fi. No problem with the Macbook and iPad. A lot of people seem to have the same problem. What's the solution?

I have a year-old iMac and Macbook, both on 10.7.3. Every time the iMac goes to sleep I lose wi-fi from Airport Express. No problem with the Macbook or my iPad. It seems a lot Mac users are having the same problem. Is there a solution? Does Apple have a solution?

Sometimes there are problems.
Somethings to try but probably won't help....
1. Repair Disk Permissions
2. Startup in Safe mode by holding down the "Shift" key....
3. Reset the P Ram by holding down the "Command/Option/P/R" keys at the same time...
The above are standard items to do on any Mac from time to time.
I repair permissions at least once a month....
The other 2 periodically as they do straighten things out when they get out of whack....
Thanks for the feedback.

ATV looses connection because iMac goes to sleep.

Everything connects fine and I can stream a movie or music for about 30-40 minutes then it all stops when the iMac goes to sleep. The Mac energy save options have the 'wake for network access' box checked, but it still goes to sleep. What am i doing wrong?
Setup: iMac-Airport Extreme - ATV3

You've reset the SMC, how about the PRAM?
https://discussions.apple.com/docs/DOC-3603

IMac goes to sleep; won't wake up

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