IMac is unresponsive after waking from sleep

Have a late 2006 20 inch iMac
This just started happening... after a long sleep when you wake screen is either blank or frozen.
Restart does NOT help... Just have a blank screen. Sometimes a flashing question mark
The only way is to restart with a safe boot. Then it takes at least 10 minutes to come back up.
Then if you restart it's ok until it goes to sleep again.
Sometime just checking something like mail will freeze the system
Have done the pram reset. Used disk utilities to check/repair HD... Said all was fine. repaired permissions etc.
Was running system 10.5.8 upgraded to system to 10.6.4 same results
Have not done a complete erase of HD yet
Any ideas? Thanks

I'm having the same issue with my Macbook, and it started just after I updated to 10.6.5. This has happened ~5 times in the last week and I never had this problem before. Either there's a blank screen after wake or there is no response when I type into the log in screen (I have mine set up to require a password after wake)

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Trackpad unresponsive after waking from sleep with new 17" MacBookPro

We have two 17" MacBookPros and both have this symptom. After waking from sleep or booting, the trackpad is unresponsive. Eventually full control comes back to the trackpad but it takes a while.
Both computers are up to date with all software.
Any thoughts?
Really irritating.

Perhaps they are freezing for awhile? Maybe basic repairs are in order.
Try using Disk Utility to do a Disk Repair, as shown in this link, while booted up on your install disk.
You could have some directory corruption. Let us know what errors Disk Utility reports and if DU was able to repair them. Disk Utility's Disk Repair is not perfect and may not find or repair all directory issues. A stronger utility may be required to finish the job.
After that Repair Permissions.
No need to report Permissions errors....we all get them.
 DALE

Sound volume control unresponsive after waking from sleep

Lately, a strange problem has developed on my MacBook 13-inch Aluminum (Late 2008), running Mac OS X 10.6.4:
After waking the MacBook from sleep, the sound volume control keys on the keyboard does not affect the volume control of:
* Neither the sound volume output by the built-in speakers,
* nor the sound volume indicator/slider in the menubar,
* nor the sound volume indicator/slider in the Sound preference pane in System Preferences,
Only the sound volume slider/indicator in the Sound preference pane in System Preferences has an effect on the actual volume ouput by the built-in speakers.
First I thought the problem was affected by disconnecting a set of analog headphones while the MacBook was sleeping -- it seemed that after sleep the volume control keys on the keyboard and menubar item still was set to affect the headphone port and not the built-in speakers.
However, the problem just occured after sleeping without anything connected to the MacBook. The built-in speakers were muted, when the MacBook lid was closed, and the computer went to sleep - after waking from sleep the built-in speakers were unmuted - and control was only possible through System Preferences.
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Not sure if you stumbled on the other threads like this one:
http://discussions.apple.com/thread.jspa?messageID=11801555&#11801555
I've been having the same problem on my Mac Pro for a while, finally decided to see if there were some other people having the problem. I'll see if the others have a solution yet.
One workaround I've been doing is to go to Preferences -> Sound and select a different output device. For me, I have to flick to Internal Speakers and then back to Line Out.
Brett

External Hard disk unresponsive after waking from sleep

i have an external usb2 drive connected to my 15" mbp. when waking from sleep, the drive is shown as mounted by accessing it gives me the spinning beachball icon and the computer stops responding until i pull out the usb cable from the mbp. it then proceeds to give me a device removal error. the external drive draws power from the usb bus.
other than this one issue the hard drive works perfectly on both ports.

I got home from work today and was forced to hard restart AGAIN. It seems to be happening more and more often now, but maybe that is just me.
My logitech revolution mouse has never caused problems before with a g4 powerbook or g5 tower. The last thing I added was the apple wireless keyboard. I can't imagine it being the problem since it is using an apple product with an apple computer.
I read the link you sent and used Disc Utility to repair disc permissions and received the following warnings:
Repairing permissions for “Macintosh HD”
Warning: SUID file "usr/libexec/load_hdi" has been modified and will not be repaired.
Warning: SUID file "System/Library/PrivateFrameworks/DiskManagement.framework/Versions/A/Resources /DiskManagementTool" has been modified and will not be repaired.
Warning: SUID file "System/Library/PrivateFrameworks/DesktopServicesPriv.framework/Versions/A/Reso urces/Locum" has been modified and will not be repaired.
Warning: SUID file "System/Library/PrivateFrameworks/Install.framework/Versions/A/Resources/runner " has been modified and will not be repaired.
Warning: SUID file "System/Library/PrivateFrameworks/Admin.framework/Versions/A/Resources/readconf ig" has been modified and will not be repaired.
Warning: SUID file "System/Library/PrivateFrameworks/Admin.framework/Versions/A/Resources/writecon fig" has been modified and will not be repaired.
Warning: SUID file "usr/libexec/authopen" has been modified and will not be repaired.
Warning: SUID file "System/Library/CoreServices/Finder.app/Contents/Resources/OwnerGroupTool" has been modified and will not be repaired.
Warning: SUID file "System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent" has been modified and will not be repaired.
Permissions repair complete
I don't know if that has anything to do with the issue I'm having or not. Help!!!

System unresponsive after waking from sleep

I've been looking at G4 dual 1.25ghz MDD, which for ages has been impossible to wake from sleep without a hard restart.
Anyway, we've done a complete erase, reformat, re-install 10.4.11 which has cured the problem almost, but not entirely.
The computer now merrily goes to and wakes from sleep, with the display reappearing and the cursor visible and active, but the system is completely unresponsive for about 20 seconds, then it is back to normal. Any attempt to click on a dock icon in that period leads to a bouncing icon, but the application will not launch. After about 10 seconds of this the system will completely stop, except that the cursor will still freely move around the screen.
Checked the ram, zapped PRAM, NVRAM, PRAM battery is not that old and should be ok, but I haven't yet tried with a fresh one, no other USB or FW devices attached, monitor attached by VGA.
Anyone got any other ideas?

Reset PMU ? Although from what you say, it's doesn't look like a PMU problem.
Could be AppleTalk restarting, or something else that stops when you put the Mac to sleep.
Many MDD users had a similar issue when wakin g from sleep, usually with an ADC monitor, rather than VGA or DVI, requiring the PMU reset as the MDD had to power up the monitor too (not on it's own power supply as it is with DVI / VGA) and it would have trouble doing so.

My iMAC often freezes after waking from sleep, or occasionally freezes at random. How do I stop this?

I have 10.6.8 on my iMAC. I have been shutting down my iMAC partly because I often get freezes a few seconds after the mac wakes. The freezes also occur at random. There is seldom any way to shut down the MAC except by pulling the power cord, though very rarely I am able to finally achieve a normal shutdown. I have tried fixing permissions as well starting in Safe Mode, and while these seemed to help at first, they no longer seem to have any affect.
I thought that maybe I got some kind of virus/trojan/etc., but from what I have read here that very likely is not the case.
I have also read here that the issue could be "hardware." Does this mean things like my printer or external speaker, or external hardrive? or does it mean the hardware of the computer itself? I have read about a "Hardware Test." Does this "Apple Hardware Test" have a benefit here in figuring out the problem?
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FussGus,
Welcome to the Apple Discussions!
What periherals, especially USB ones, do you have attached to your Mac? Does the problem persist with everything other than the Apple keyboard and mouse disconnected?
Does the problem persist if you Start Up in Safe Mode? If so, check what items are in /Library/StartupItems and /Library/PreferencePanes.
As generic advice for sleep-related issues:
For a Mac OS X with sleep problems (file names and locations are for 10.4.x):
-- trash /Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist
-- trash /Users/[username]/Library/Preferences/com.apple.systemuiserver.plist
-- reboot while resetting PRAM (restaqrt while holding down command-option-p-r until you hear three sets of chimes, then release the keys)
While not directly related, since your wakes before freezing, also refer to Computer Will Not Wake From Sleep

MBP Unresponsive after waking from sleep

Hey Guys, I have found some similar discussions but nothing has helped me so far so I figured I would ask this in my own words and see if anyone has a solution.
Occasionally (up to once per day) I will try to wake my MBP and it will be completely unresponsive, forcing me to force-shut-down using the power button. When this happens the fan will be running at a high speed and the entire computer will be very hot.
This may have something to do with using second displays as this seems to happen frequently after using displays, however, it seems to happen without using secondary displays as well.
Please help! This has been going on for quite some time and it is driing me crazy!
Spencer
Processor 2.8 GHz Intel Core i7
Memory 4 GB 1067 MHz DDR3
Graphics Intel HD Graphics 288 MB
Software Mac OS X Lion 10.7.3 (11D50)

Thanks, Linc. I was worried that since this was a refurbished computer, it was dying again. Makes sense, although alittle annoying that nothing really warns you this is happening. I almost cycled power the first couple times it happened, thinking it was stuck while waking.

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After waking from sleep, my iMac (Lion) is unresponsive. The mouse moves, but when I click things it won't open them.
This has happened EVERY time the iMac goes to sleep for the last few days.. the only way I have found to resolve the issue is to manually restart the computer each time via the button on the back of the iMac.
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Thanks

FWIW, I never sleep my machines or their HDs, just their displays and never have an issue waking up the displays, usually run 24/7. Give that a shot.

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On my new iMac, mail has no sound after waking from sleep. If I select do not wake for network access in general preferences, the problem does not occur. Anyone have an idea on how to fix this? Thanks --

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Could it be the Netgear Wireless Router 3 years old? Full signal strength!

Me too!
I am on a MAC Pro desktop and I am having the same issues. I go to system preferences and just click the network icon. Then I close mail and when it opens it now sees the network. This is getting very annnoying.

My iMac won't automatically connect to wifi after waking from sleep mode

After dowloading the newest software update and performing a firmware update for my Airport router, my Imac won't connect to Wifi automatically after waking from sleep mode

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Anyone experienced this problem? Photoshop users will be familiar with the terms I'm using to describe this issue...
After waking from sleep, my iMac will display the screen saver -- in this case, "Beach" -- in a frozen state (not moving at all). The photo has a lower opacity, with a checkered background similar to what you'd see in Photoshop when the background is Transparent rather than opague. Clicking on the mouse or keyboard has no effect, but when I turn the power off and then on again, all is back to normal, with the Leopard desktop and Dock back in their normal places.
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Ok I am not that fmrealer with Photoshop. But this is what I would do.
1. Resart my computer.
2. Call apple or Photoshop.
3. Re install Photoshop.
4. It is not the end of the world and it sounds kind of cool.

IBook G4 temporarily unresponsive when waking from sleep on AC power

Hi,
I've noticed that my iBook G4 (late 2004) is temporarily unresponsive when waking from sleep, after having slept and been awoken on AC power (with the battery removed). The computer wakes up, but does not respond to trackpad or keyboard inputs for a non-trivial amount of time (30 seconds or so). There are no problems when sleeping and waking with the battery plugged in. I remove the battery to try to maintain it at a constant 40% load to conserve battery capacity. I am running Mac OS X 10.4.6.
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And yes... everything is normal at wake-up.
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Here's an odd problem that's been bugging me for awhile now.
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Since installing Lion (and updating to 10.7.1) on my 2008 24" iMac I have noticed that after waking from sleep the internet connection takes about 10 seconds to restore. I have reset the SMC and PRAM and performed a safe boot (in case this helped) but to no avail. The slow conenction can be observed if after waking from sleep the Network System Preference is clicked and the ethernet status "light" is red, changes briefly to amber and then green indcating a connection. The iMac is connected via an ethernet cable to a Linksys 802.11n 4 port wireless router.
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Thanks to those wiser than I, who might read this note.

SOLUTION FOUND!
I've found a list of possible solutions here's the link:
http://osxdaily.com/2011/07/22/wifi-dropping-in-os-x-lion-fixes/
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IMac is unresponsive after waking from sleep

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