My iMac won't wake up when it's been asleep for awhile

Each morning now, (since the last update of ML) my iMac won't wake up from sleep when I try from either
my bluetooth keyboard or mouse. Seems like it would be a bluetooth connection issue but how do
I make sure it will not interfer with waking up my computer.
I tried pushing the on/off button briefly to get it to wake up but no luck there. I always have to restart
it.

This sounds like the intermitent problem that has been around for a few users since some point during 10.6 Snow Leopard. I had the problem off and on and found the only 'fix' that worked 100% was to set: System Preferences>Energy Saver and set 'computer sleep' to 'never'.

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Any suggestions would be great.
thanks,
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My macbook pro makes that ejecting noise when i open it but not every time usually when i ve been away for awhile then take it out of sleep it makes the noise is this normal?

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Yes, it's normal.
Apple released a firmware update a couple of years ago that was supposed to stop the drive from making that noise in certain models that were available then, but even the update didn't work all the time. The noise is completely harmless and not indicative of any problem. Just ignore it.

I have recently upgraded and am finding my iMac won't wake from a sleep state 80% of the time. What do I need to change or do to prevent this?

have recently upgraded and am finding my iMac won't wake from a sleep state 80% of the time. What do I need to change or do to prevent this?

Hi 02SilverSport,
Try using the power button to wake the iMac.
OS X Mavericks: Using the power button
http://support.apple.com/kb/HT5869
If you are using a wireless keyboard or mouse, check out this article:
OS X Mavericks: Wake your computer with a wireless mouse or keyboard
http://support.apple.com/kb/PH13997
And for more generic troubleshooting, try this one:
OS X: When your Mac doesn't sleep or wake
http://support.apple.com/kb/TS5357
where there's a section for "Your computer cannot wake from sleep" and "Your computer is slow to wake from sleep".
Best Regards,
Nubz

Imac won't wake from deep sleep

This just started a week ago- in the morning after my Imac has been asleep for a few hours, I will try to wake it by pressing the keyboard or mouse and nothing happens- powerswitch is unresponsive, I eventually have to unplug and replug to start it up. During the day it will sleep and awake normally, it just seems to happen after long periods of time. The only thing I can think of is recently there i installed an Itunes update, could this screw things up? I have a (pre intel) IMAC running OSX 10.3.9 -1.6ghz and 512MBSo far I did the following:
1. ran hardware diagnostic test from CD (passed)
2. Zapped pram (command-option, p and r during start-up)
3. File system check (fsck -yf)
4. Trashed powermanagement.plist preferences
5. Deleted system cache and repaired disk permissions
6. Reset open firmware ( reset-nvram, reset-all)
This morning I tried to wake up the imac and the same response, nothing. Sleep light pulsating, but when I touch the keys, there is no response, the imac seems to do into a deep sleep. I had to unplug and replug again. Is there anything else I can try?
This all seemed to start when I installed the latest security update and newest Itunes, could this be a connection? If so, is there anyway to uninstall these?
Imac G5 (pre-intel) Mac OS X (10.3.9) 1.6ghz/ 512MB

Henry, there are reports of problems occurring with updates, I don't think you can un-install the Security update, and as far as reverting to an earlier version of iTunes, well, you could try and extract an earlier version from your receipts folder, but I would hesitate to mess with iTunes, you might lose your entire library.
What I would recommend is an Archive and install, or perhaps an upgrade to Tiger.
Let me know what you do,
Miriam
P.S., if you'd like, go ahead and click the "Helpful" or "Solved" buttons on any of the posts / replies above if you feel they were helpful or adequately answered your question.

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If no joy...
Press and Hold the Sleep/Wake Button and the Home Button at the Same Time...
Wait for the Apple logo to Appear...
Usually takes about 15 - 20 Seconds... ( But can take Longer...)
Release the Buttons...
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Be sure to make an appointment first...

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Restoring Mail is complex. Luckily, the late James Pond left us an illustrated guide:
You can restore the Mail messages and indexes to the way they were (provided you have a Backup from around that time)
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I've read elsewhere that the bluetooth unavailable problem may be connected to the power management unit, which may in turn explain what is going on with it not rebooting. But I'm not sure.

IMac won't wake with touch of mouse or allow remote connection when sleeping

My iMac will not wake with just the touch of the mouse any longer now that I have Mavericks. It did with Snow Leopard, but not with Mavericks. Now I have to hit a key on the keyboard or hit the mouse.
Also, when the computer does wake now, it take a while for the internet to connect again, the clock to update and my email to come into Outlook. When the mail does come in, the receipt time is wrong, of course.
In addition, I used to be able to connect from my windows laptop to the iMac through Filezilla even when the iMac was sleeping. I cannot do this with Mavericks. I have to physically go to the iMac and wake it up and then I can connect to it remotely. Kinda ruins the whole point.
I’ve made sure “Wake for network access” is checked in System Preferences > Energy Saver and I’ve made sure “Wake on Wireless: Supported” in there in System Information when accessed by Option + Apple icon.
How can I get my computer back to where it was- waking with only a touch of the mouse (not pressing keys) and accessing it remotely while sleeping?
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Thank you in advance for your help!

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Imac won't wake up since 10.4.7 update

Hello! I have a 17" imac g5 (purchased in 12/05) that will NOT wake up from sleep now since I have done the OS X 10.4.7 update. I have to hold the on/off button for at least 5 seconds and by the 2nd or 3rd time it will finally come on. Any ideas?? The only peripheal I have is a card reader. It does it with that unplugged. I also fixed disk permissions, still won't wake up. Since I am still relatively new to Mac, I need detailed instructions. Thank you so much in advance!!

Hello,
At this point, it would seem that you are down to two last options:
1) Re-install OS X from your original Restore disks.
2) take it in for repair and see if it's a hardware problem.
I think you have the last version of the iMac G5 (the one with the iSight). If so, you are still under warranty since those came out around November or December. So, you should still be in your first year (a 3 or 4 months left).
I think at this point, it would be best to do two things:
1) Run the hardware test that came with your computer. See if that finds a problem.
If it does, we'll stop there, and let you take it in for servicing.
This should be on one of your restore disks. It will say Apple Hardware Test on the disk somewhere (smaller print). And, provide directions for starting the test on your particular system.
Now, once you are in the test, run both the standard and extended tests. See if either finds a problem. This could take a couple of hours.
Let me know what it says.
2) Now, if it doesn't find any problems, then I would propose that you re-install OS X from scratch.
I would first copy any important information to an external drive or disk.
If you have an external hard drive, you could make a full backup of your entire hard drive using a program such as Carbon Copy Cloner:
http://www.bombich.com/software/ccc.html
This program can be used to create an exact clone of your main hard drive.
So, it is a bootable backup that can be used to put your entire system back exactly as it was at the time of the backup.
This means that if something happens, you can boot from your external drive, and resume normal work. Or, you can boot from the external drive and run the program again to restore your computer to match the backup.
This backup is an exact clone of your entire installation, so it is readable by another machine.
It works great, and I've never had a problem with it.
But, I use the "Clone" feature.
This has the advantage of being able to restore quickly, and return back to the exact point you were at when you backed-up.
In your situation, we would use this backup for two purposes. First, it ensures that all your important information is backed-up. Second, it means that if your new installation doesn't fix the problem, you could just revert back to this installation and everything would be like it was.
Now, if you don't have an external drive, then just backup your important files (e-mails, documents, downloads, anything of importance to you) to another disk (CD-R or DVD-R, etc.).
Make sure you get the 10.4.7 Combo Update stored somewhere so you can update again without downloading it.
Once you have verified that everything you want is safely stored on another disk or drive, then you could proceed with the re-install.
Make sure you disconnect any external drives (FireWire, USB) and other accessories before re-installing. Just keep your keyboard and mouse connected.
You can install OS X by booting from your Restore disks. Insert the disk, and restart while holding down the letter C on your keyboard until it finishes booting from the restore disk.
Once started-up, I would personally recommend using the "Erase and Install" option. This will give you a completely fresh installation without any of your old bugs getting carried-over.
The "Archive and Install" will basically install a fresh copy of your OS X while preserving your settings and installed software.
Here's a good article summarizing your options and how each works:
http://docs.info.apple.com/article.html?artnum=301270
The problem with Archive and Install is that sometimes problematic settings will survive using this method.
So, for best results, use the Erase and Install. Since you already have everything copied to another disk, this shouldn't be a problem.
Once the fresh installation is done, then see how your system behaves.
If everything is fine, then immediately install the 10.4.7 Combo Update.
Now, repair permissions.
See how things are now.
If everything is fine, then go ahead and setup your e-mail, programs etc.
Copy your data and files back, and resume operations
3) Now, if things still don't work right, then call your service shop and arrange for warranty repair.
It is a pain to go through all these steps. But, the service shop will blame software first unless the hardware test reveals a problem.
So, by doing a fresh install, you beat them to it. You can tell them you have already done that, and know the problem is hardware related.
Anyway, I hope that the re-install isn't needed. But, if it is, then the steps are listed above.
Start with the hardware test and other ideas above first. But, if those don't work or reveal something, then go ahead and re-install and let me know what you find.
Keep me posted on your progress, and let me know what does or doesn't work for you.
I hope this helps.

IMac won't "wake-up" after installing latest security update

I have a fairly new iMac G5 2GHz, and just installed the latest security update yesterday(4/1/06). Since that update, everytime my computer goes to sleep, I can't wake it up.
The power light is on and I hear the computer running... I can even hear the error "bonk" when I try and hit a bunch of keys, but still won't wake up. Was NEVER a problem until yesterday and I haven't installed anything else.
Thanks in advance

I have a fairly new iMac G5 2GHz, and just installed the latest security update yesterday(4/1/06). Since that update, everytime my computer goes to sleep, I can't wake it up.
The power light is on and I hear the computer running... I can even hear the error "bonk" when I try and hit a bunch of keys, but still won't wake up. Was NEVER a problem until yesterday and I haven't installed anything else.
Thanks in advance

IMac won't wake up in the morning

iMac put to sleep around midnight, won't wake up at 7.00am . i have to hold the power button for approx.15 seconds then it restarts.
The machine is only 1 year old and has had been trouble free until upgrade to Yosemite. No mail is really slow - but works OK, and safari regularly crashes or I get the 'beach ball' when moving to a new page.
Within the last 2 weeks, now have this refusing to wake problem.
What's going on at Apple?

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

IMac won't wake at times

A couple of times recently, my iMac will not wake from sleep. Not only that, but it will not start from the rear power button.
I have to unplug the power cord and then it will start up. Any ideas as to the problem?
Model Name: iMac
Model Identifier: iMac7,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 2 GB
Bus Speed: 800 MHz
Boot ROM Version: IM71.007A.B03
SMC Version: 1.20f4

+The System Management Controller (SMC) is a chip on the logic board that controls all power functions for your computer. If your computer is experiencing any power issue, resetting the SMC may resolve it. The SMC controls several functions, including:+
+Telling the computer when to turn on, turn off, sleep, wake, idle, and so forth.+
+Handling system resets from various commands.+
+Controlling the fans.+
http://support.apple.com/kb/HT1543?viewlocale=en_US

My iMac doesn't wake up when I hit the wireless keyboard

I leave my imac on all the time, I have a wireless bluetooth keyboard and sometimes when I hit the keyboard my imac doesn't wake up. Is this an issue that anyone else has delt with? Is it a keyboard issue or a computer issue?

Weak battery?
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My iMac won't wake up when it's been asleep for awhile

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