IMac Spontaneous waking from Sleep

Hello - I have a 24" iMac running Snow Leopard - for about the last 4 days, whenever I put it to sleep, it wakes itself up again after about 5 minutes. I usually keep it asleep when I'm not using it, and it rarely gets powered down. The only thing that's happened to it recently is that it was powered down for a week while I was away, and it's since it's been switched on again that the waking thing's been happening.
Anyone seen that before?

I'm already on 10.6.1 Dani - It's still happening! The last couple of days it's been losing my wireless keyboard and mouse as well. The mouse needed some new batteries, but the keyboard's are still at about 49%. I'm wondering if it's going to sleep properly at all - when it wakes up, I get a quick flash of my screen-saver before it loads my desktop, which it's never done before.
There must be something running in the background that wakes it up, but I can't find it.

Similar Messages

  • Can iMac not waking from sleep be caused be a corrupt file

    I have had my 27" iMac from July of 2011 (running Montain Lion, 8 GB RAM, 2TB hardrive, 3.4 GHz,Intel i7) for over a year and a half and ever since I bought it, it has had a problem waking from sleep.  I can hear the computer running, but when I click the mouse, keyboard, or power button, it stays asleep and I am forced to do a hard shut down.  Apple has been trying to fix the issue, but to no success.  They have replaced the hard drive, logic board, usb ports, RAM, mouse and keyboard, but it still happens.  They finally threw in the towel and are replacing the machine.  They offered to transfer all of our files (jpgs, mp3s, docs, videos, etc), but one thought occurred to me... what if the sleep issue is caused by a corrupt file?  I highly doubt that is the case, but wonder if any of the experts out here would know better than I.
    If we didin't have the data transfered, we would just keep it on an external hard drive instead.  But, I would assume that it wouldn't matter if the files were on internal vs. external because either way, the computer would access the files.  That being the case, if the sleep issue was caused by a corrupt file, the computer would still access it on the external and the sleep issue would resurface.
    So, 2 questions:
    Can a corrupt file cause the sleep issue?
    If it is true that a corrupt file can cause the sleep issue, would it matter if the corrupt file was accessed from an external drive vs. internal drive?
    Thanks so much!
    Chris

    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 your problem is caused by third-party system modifications that load automatically at startup or login. 
    Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
    Shut down your computer, wait 30 seconds, and then hold down the shift key while pressing the power button.
    When you see the gray Apple logo, release the shift key.
    If you are prompted to log in, type your password, and then hold down the shift key again as you click  Log in.
    *Note: If FileVault is enabled under OS X 10.7 or later, or if a firmware password is set, or if the boot volume is a software RAID, you can’t boot in safe mode. Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.  The next normal boot may also be somewhat slow.
    The login screen appears even if you usually log in 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, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

  • My 2007 Intel iMac is waking from sleep on its own during the early morning hours. Not sure why. Is there a way to find out by looking at some sort of log files or something else?

    I'm wondering if someone else is having control of my iMac as it randomly wakes up from sleep while I am sleeping sometime during the night. I've woken up with the light from the monitor brightening my room. Need to find out what is causing it to wake up and stay on. Any suggestions?

    I've had this same issue lately. Here's one thing to check: System Preferences > Energy Saver > Wake for Network Access should be unchecked.
    Mine is unchecked, so the only other thing I can think of is that it might be Time Machine backing up. My iMac is backing up to an external hard drive, and also sharing that drive over the network so two other Macs can back up as well.
    Should be an easy theory to test. Turn off AirPort, unplug Ethernet, and let the iMac sit. See if it still happens.

  • Pop on waking from sleep

    just got a new 27" iMac.
    when waking from sleep it emits a very noticable pop from the speakers plugged into the headphone socket. got several other macs, and AFAIK this is the only one that does it. the 24" iMac that the new model has replaced didn't do it when plugged into the same speakers.
    no popping when using the imacs internal speakers, but i did try a different pair of externals, and had the same noise.
    is it normal, or should i contact apple?

    Sorry, meant space bar.
    Yes, the energy saver settings have all been tried, and locked, without changing the behavior. When the Sleep function is selected from the Apple menu, or when the appropriate period of inactivity designated in Energy Saver is reached, the machine goes to sleep, indicated by the pulsing LED.
    But when the space bar is tapped to wake it, the machine reboots -- with the previously locked icon now open, even though no action has been taken to open it.
    Following your suggestion, I tried using control-eject to put the machine to sleep (after the doubting "Are you sure..." message second guesses me) and it works as it's supposed to. What's more, the lock stays locked, now even when the time period specified puts it to sleep.
    Have never put the machine to sleep that way, but used the instruction in the User's Guide that came with it. Silly me. Thanks for setting me straight
    Mac Intel 2.66   Mac OS X (10.4.8)  

  • IMac G5 no Bluetooth on waking from Sleep

    I have an iMac G5 2 Ghz model with a wireless Mighty Mouse and Apple wireless keyboard and have recently been encountering a problem with the bluetooth connections to them on waking form sleep. Although I have searched and found threads detailing similar issues to mine, they have not been exactly the same hence my starting a new topic.
    The iMac works perfectly and I can put it to sleep just fine. Later on I can tap a key or hit a mouse button and the machine wakes up. However from that point both the keyboard and mouse are unresponsive, I will get the screen pop-up message telling me that the keyboard and mouse are disconnected, the bluetooth icon in the menu bar is crossed out but the machine itself has not crashed, the clock continues to click up, I have an animated desktop background which continues to play and if I plug a standard USB mouse in, that works.
    If I leave it alone (literally for five or ten minutes), then nine times out of ten, the mouse and keyboard will suddenly start working, disconnect again for a few seconds, reconnect and then work perfectly for the rest of the day as long as the iMac doesn't sleep. Sometimes the bluetooth system simply doesn't come back up even after twenty minutes or so and I am forced to hard reset the machine an reboot. From a restart, the system always works perfectly.
    What I don't understand is if the bluetooth system is loosing connection when asleep, how comes a tap on the mouse will wake it up ok and then it disconnects?
    So far I've reset the PRAM and Power Management systems, trashed the bluetooth preference files and restarted, and run a permissions check. These seem to make it better for a while but the problem comes back. It doesn't seem like a hardware problem in that it all works perfectly while kept awake but I'd be grateful if anyone has any suggestions as to what I can try next or look for.
    Many thanks in advance.

    OK obviously tempted fate by posting, the bluetooth problem has returned!
    While awake both the keyboard and mouse connections are rock-solid, on startup, both connect instantly it's just waking from sleep that's the issue.
    I had the problem just a few minutes ago, the Mac had been asleep for about 30 minutes, I tapped the mouse and it woke up, I could even move the mouse pointer around for a few seconds and then it suddenly froze. The Connection Lost message (for the mouse not the keyboard) appeared on the screen and the bluetooth icon in the menu bar changed to the 'no connection' sign. If I flip the mouse over the little green led doesn't come on.
    After about ten seconds the bluetooth icon changed to normal and the mouse worked-for about two seconds then the whole cycle repeated. This happened three times, the mouse worked for a few seconds, the connection dropped and I had to wait about twenty seconds for it to come back to life on its' own. I tried the volume up and down on the BT keyboard but that wasn't working either. On the third time of dropping, the bluetooth assistant fired up telling me that there was no keyboard attached, just as the mouse resumed working on it's own. It searched for a keyboard, told me that it couldn't find one and then immediately told me that a keyboard was attached and no further action is required.
    And from that point on both have worked perfectly. If it was just the mouse or the keyboard, I'd suspect that was the problem but I find it hard to credit that both would fail at the same time.
    Well I'm now officially stumped. Surely it's inconceivable that a failing BT module would not work on waking but be perfect all the rest of the time?
    Any ideas or suggestions would be gratefully received.

  • Since updating to Lion the iMac won't recognise the external hard drive (maxtor) when waking from sleep mode,

    Hi All, Since updating to Lion, my imac won't recognise the ext HDD (Maxtor) when waking from sleep mode, I have tried another port, diisc utility (Ext HDD not listed in here) but nothing works. I now find that I have to restart the imac to get the drive recognised..which is fine until the imac goes into sleep mode then I lose the drive and have to restart etc etc.....anyone suffering same issue.  The Ext Drive worked perfectly until the upgrade..

    Thanks for this, and apologies for delay in replying...in between seeing your post I backed up the ext hdd to another mac and used the disc utility to erase and repair and then re mounted the ext hdd. OK.  I have then tested the ext hdd being recognised when waking from sleep mode a few times and everything appears to be fine. If this doesn't work (long term) I will follow the instructions as you have suggested....
    I now have a new problem with my HP printer (Photosmart Plus) which is not being recognised by a new wireless router..Ok whilst the router is switch on and I have reconfigured the printer..but when the router is switched off overnight and then switched back on...I get a 'printer is not connected' message and have to go through the re configure routine all over. I am minded to think this is a router problem as the same issue is happening to my wifes Mac Book Pro (which is only a few weeks old)...any suggestions..

  • IMac loses connection to network when waking from sleep

    Hi There,
    We are a small mixed environment of Macs and PCs running on a Windows 2008 domain. One of 2 iMacs that now run Mountain Lion 10.8.5 is having problems when waking from sleep. One of our designers will go for lunch and the machine will sleep for about 30 to 40 minutes. Upon her return the iMac will kick her off of the 3 shares she usually logs into (2 are on Win2008 machines, and 1 is a MacPro running 10.6.8 Server).
    If she has files open in any of the Creative Suite Apps, the app will crash and she will have to restart the whole machine. If no files are open then she can usually reconnect to the shares after a short while.  Obviously I told her not to leave any files open, but its causing her some headaches.
    Its also creating srv errors (id 2012) on our domain controllers, when she tries to wake her machine.
    This Imac is a late 2009, and we have a 2011 model that has no issues at all. Both are set exactly the same.
    I have reset SMC, Pram, and rebinded to the domain, and searched through these forums quite a bit to no avail.
    Any thoughts or suggestions would be much appreciated.

    I am continuing to work on this issue, and have tried a number of things based on searching here and elsewhere.
    And Lucky Me, I have been able to replicate this behavior on one of other Macs (imac 2011, on 10.8.5). I also see errors on 2 separate Windows file servers on the domain (Event ID: srv 2012).
    Below I am posting what seems to be the relevant area of the log.
    Nov 14 11:48:04 PrePressMac2 kernel[0]: Wake reason: EHC1
    Nov 14 11:48:04 PrePressMac2 kernel[0]: Previous Sleep Cause: 5
    Nov 14 11:48:04 PrePressMac2 kernel[0]: The USB device HubDevice (Port 1 of Hub at 0xfd000000) may have caused a wake by issuing a remote wakeup (2)
    Nov 14 11:48:04 PrePressMac2 kernel[0]: 18323.795216: setDISASSOC from ATH_INTERFACE_CLASS disconnectVap
    Nov 14 11:48:04 PrePressMac2 kernel[0]: 18323.795224: switchVap from 1 to 1
    Nov 14 11:48:04 PrePressMac2 kernel[0]: The USB device Keyboard Hub (Port 3 of Hub at 0xfd100000) may have caused a wake by issuing a remote wakeup (3)
    Nov 14 11:48:04 PrePressMac2 kernel[0]: The USB device Apple Keyboard (Port 2 of Hub at 0xfd130000) may have caused a wake by issuing a remote wakeup (3)
    Nov 14 11:48:04 PrePressMac2 kernel[0]: HID tickle 117 ms
    Nov 14 11:48:04 PrePressMac2 kernel[0]: TBT W (1): 0 [x]
    Nov 14 11:48:04 PrePressMac2.local WindowServer[90]: handle_will_sleep_auth_and_shield_windows: no action for lock state 1
    Nov 14 11:48:04 PrePressMac2.local WindowServer[90]: Created shield window 0x1e1 for display 0x003f003d
    Nov 14 11:48:04 PrePressMac2.local WindowServer[90]: handle_will_sleep_auth_and_shield_windows: no action for lock state 1
    Nov 14 11:48:04 PrePressMac2.local WindowServer[90]: Created shield window 0x1e2 for display 0x003f003e
    Nov 14 11:48:04 PrePressMac2.local WindowServer[90]: handle_will_sleep_auth_and_shield_windows: no action for lock state 1
    Nov 14 11:48:04 PrePressMac2.local WindowServer[90]: Created shield window 0x1e3 for display 0x003f003f
    Nov 14 11:48:04 PrePressMac2.local WindowServer[90]: handle_will_sleep_auth_and_shield_windows: no action for lock state 1
    Nov 14 11:48:04 PrePressMac2.local WindowServer[90]: Created shield window 0x1e4 for display 0x003f0040
    Nov 14 11:48:04 PrePressMac2.local WindowServer[90]: handle_will_sleep_auth_and_shield_windows: no action for lock state 1
    Nov 14 11:48:05 PrePressMac2 kernel[0]: AppleBCM5701::selectMedium - autoselect, any duplex, EEE allowed, flow control allowed
    Nov 14 11:48:05 PrePressMac2 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link down on en0
    Nov 14 11:48:06 PrePressMac2.local KernelEventAgent[47]: tid 00000000 received event(s) VQ_NOTRESP (1)
    Nov 14 11:48:06 PrePressMac2.local KernelEventAgent[47]: tid 00000000 type 'smbfs', mounted on '/Volumes/PrePress', from '//aconti@GAIA/PrePress', not responding
    Nov 14 11:48:06 PrePressMac2.local KernelEventAgent[47]: tid 00000000 found 1 filesystem(s) with problem(s)
    Nov 14 11:48:10 PrePressMac2 kernel[0]: Ethernet [AppleBCM5701Ethernet]: Link up on en0, 1-Gigabit, Full-duplex, Symmetric flow-control, Debug [796d,0321,0de1,0300,c5e1,7800]
    Nov 14 11:48:12 PrePressMac2.local configd[19]: network changed: v4(en0+:192.168.1.184) DNS+ Proxy+ SMB+
    Nov 14 11:48:12 PrePressMac2.local SophosAntiVirus[67]: reloading scheduled scans...
    Nov 14 11:48:12 prepressmac2.cutpasteandprint.net configd[19]: setting hostname to "prepressmac2.cutpasteandprint.net"
    Nov 14 11:48:12 prepressmac2.cutpasteandprint.net digest-service[1048]: label: default
    Nov 14 11:48:12 prepressmac2.cutpasteandprint.net digest-service[1048]:           dbname: od:/Local/Default
    Nov 14 11:48:12 prepressmac2.cutpasteandprint.net digest-service[1048]:           mkey_file: /var/db/krb5kdc/m-key
    Nov 14 11:48:12 prepressmac2.cutpasteandprint.net digest-service[1048]:           acl_file: /var/db/krb5kdc/kadmind.acl
    Nov 14 11:48:12 prepressmac2.cutpasteandprint.net digest-service[1048]: digest-request: uid=0
    Nov 14 11:48:12 prepressmac2.cutpasteandprint.net rpcsvchost[1049]: sandbox_init: com.apple.msrpc.netlogon.sb succeeded
    Nov 14 11:48:12 prepressmac2.cutpasteandprint.net digest-service[1048]: digest-request: init request
    Nov 14 11:48:12 prepressmac2.cutpasteandprint.net digest-service[1048]: digest-request: init return domain: CPP server: PREPRESSMAC2
    Nov 14 11:48:12 prepressmac2 kernel[0]: Sandbox: sandboxd(1050) deny mach-lookup com.apple.coresymbolicationd
    Nov 14 11:48:12 prepressmac2.cutpasteandprint.net sandboxd[1050] ([1049]): rpcsvchost(1049) deny file-read-data /private/var/root/Library/Preferences/ByHost/.GlobalPreferences.037506C4-0B10-5 70D-A7B6-B3B8F7AE0CC6.plist
    Nov 14 11:48:12 prepressmac2.cutpasteandprint.net sandboxd[1050] ([1049]): rpcsvchost(1049) deny file-read-data /private/var/root/Library/Preferences/.GlobalPreferences.plist
    Nov 14 11:48:13 prepressmac2.cutpasteandprint.net nsupdate[1055]: krb5_sendto_context is called on main thread, its a blocking api
    Nov 14 11:48:13 prepressmac2.cutpasteandprint.net nsupdate[1055]: gss_init_sec_context is called on main thread, its a blocking api
    Nov 14 11:48:13 prepressmac2.cutpasteandprint.net nsupdate[1056]: gss_init_sec_context is called on main thread, its a blocking api
    Nov 14 11:48:14 prepressmac2.cutpasteandprint.net nsupdate[1057]: krb5_sendto_context is called on main thread, its a blocking api
    Nov 14 11:48:14 prepressmac2.cutpasteandprint.net nsupdate[1057]: gss_init_sec_context is called on main thread, its a blocking api
    Nov 14 11:48:14 prepressmac2.cutpasteandprint.net nsupdate[1058]: gss_init_sec_context is called on main thread, its a blocking api
    Nov 14 11:48:15 prepressmac2.cutpasteandprint.net nsupdate[1060]: krb5_sendto_context is called on main thread, its a blocking api
    Nov 14 11:48:15 prepressmac2.cutpasteandprint.net nsupdate[1060]: gss_init_sec_context is called on main thread, its a blocking api
    Nov 14 11:48:16 prepressmac2.cutpasteandprint.net nsupdate[1061]: gss_init_sec_context is called on main thread, its a blocking api
    Nov 14 11:48:17 prepressmac2 com.apple.launchd[1] (com.apple.smb.preferences): Throttling respawn: Will start in 5 seconds
    Nov 14 11:48:17 --- last message repeated 2 times ---
    Nov 14 11:48:17 prepressmac2.cutpasteandprint.net nsupdate[1063]: krb5_sendto_context is called on main thread, its a blocking api
    Nov 14 11:48:17 prepressmac2.cutpasteandprint.net nsupdate[1063]: gss_init_sec_context is called on main thread, its a blocking api
    Nov 14 11:48:18 prepressmac2.cutpasteandprint.net nsupdate[1067]: gss_init_sec_context is called on main thread, its a blocking api
    Nov 14 11:48:18 prepressmac2.cutpasteandprint.net netbiosd[92]: name servers down?
    Nov 14 11:48:19 prepressmac2.cutpasteandprint.net nsupdate[1068]: krb5_sendto_context is called on main thread, its a blocking api
    Nov 14 11:48:19 prepressmac2.cutpasteandprint.net nsupdate[1068]: gss_init_sec_context is called on main thread, its a blocking api
    Nov 14 11:48:19 prepressmac2.cutpasteandprint.net nsupdate[1069]: gss_init_sec_context is called on main thread, its a blocking api
    Nov 14 11:48:22 prepressmac2.cutpasteandprint.net digest-service[1048]: digest-request: uid=0
    Nov 14 11:48:22 prepressmac2.cutpasteandprint.net digest-service[1048]: digest-request: init request
    Nov 14 11:48:22 prepressmac2.cutpasteandprint.net digest-service[1048]: digest-request: init return domain: CPP server: PREPRESSMAC2
    Nov 14 11:48:22 prepressmac2.cutpasteandprint.net KernelEventAgent[47]: tid 00000000 received event(s) VQ_NOTRESP (1)
    Nov 14 11:48:22 prepressmac2 kernel[0]: smb_iod_reconnect: Reconnected share PREPRESS with server GAIA
    Nov 14 11:48:32 prepressmac2.cutpasteandprint.net ManagedClient[1077]: ODUGetMCXRecordWithCache(): record unique ID for 'PrePressMac2' not set
    Nov 14 11:48:32 prepressmac2.cutpasteandprint.net ManagedClient[1077]: ODUGetMCXRecordWithCache() Accessing network user record from Active Directory not allowed because no authentication information was supplied.
    Nov 14 11:56:25 prepressmac2 com.apple.launchd.peruser.1997381720[389] ([0x0-0x4a04a].com.adobe.InDesign[630]): Exited: Terminated: 15
    Nov 14 11:56:34 prepressmac2.cutpasteandprint.net spindump[1100]: Saved hang report for Adobe InDesign CS5.5 version 7.5.3.333 (7530) to /Library/Logs/DiagnosticReports/Adobe InDesign CS5.5_2013-11-14-115634_PrePressMac2.hang
    This is from the 2011 iMac, and I see something very similar to this on the 2009 machine. 
    I continue to think this is a software issue related to 10.8.5 and Adobe CS (CS5 on the 2009 machine and CS 5.5 on the 2011) as this appears to have come up only since the recent update.
    Any help would be appreciated.

  • After waking from sleep, my iMac (Lion) is unresponsive.  The mouse moves, but when I click things it won't open them.

    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.
    Any and all help is appreciated!
    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.

  • 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?

    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 --

    Same here on an older iMac since Lion. Thanks for the uncheck wake for network access tip though, it doesn't do it either in that case, I will leave it that way.

  • IMac loses WiFi connection after waking from sleep on OSX 10.8.2

    Bought a new mid-2011 21.5 inch IMac this week. It is not re-establishing WiFi connection after waking from sleep. Was happening on OSX 10.7 that it came with, so updated to 10.8.2 and same problem exists.
    I am running a mid 2012 MacBook Pro with Retina Display alongside, on OSX 10.8.2 and no problems at all. Cannot work out what is causing the IMac to fail and neither can Apple!
    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. 

  • IMac G5 Dies When Waking From Sleep

    I have a Rev A iMac G5 I bought in 2004. Recently it started doing some weird stuff when waking from sleep. After looking at some of the other posts, I think this is going to be repetitive, but I thought I would see if anyone had any suggestions
    After either putting the computer to sleep or letting it go to sleep, it will frequently die after the mouse has been clicked to wake it up. I have tried resetting both the SMU and PRAM as well as repairing disk permissions and repairing the disk. None of this has seemed to help. Occasionally, I get lucky and am able to wake it from sleep normally, but this doesn't happen often. After it dies following the mouse click, I can unplug it and then plug it back in and it will start up normally. Interestingly, it will start up from shutdown normally as well as restart normally. Additionally, as long as it doesn't go to sleep, I think you can typically use it as long as you want and it won't quit.
    Today, I took the back cover off and messed around with it for awhile. The diagnostic LED behavior seems odd to me. LED #1 comes on when it is plugged into the outlet. When following Apple's instructions for troubleshooting a computer that won't start up, mine does fine because as I said it will start up normally if you unplug it and then plug it back in. Because of this, I set my computer to go to sleep quickly with inactivity. Although it did wake normally at least once, it died numerous times. The irregularity seems to occur with LED #2. One time it "died", I believe LED #2 actually remained lit and something seemed to still be working based on noise. However, the green light for the "caps lock" button wouldn't come on. Other times LED #2 would go out when it died after pushing the mouse with it asleep. During these times, I could push the internal power button and LED #2 would briefly light up, but nothing more than that would happen. On more than one occasion I would then push the SMU reset button and then push the internal power button again at which point LED #2 would fail to come on at all. After pushing the power button (and occasionally pushing the SMU button again) what seemed to be a random number of times, the computer would all the sudden start up normally again.
    My top 3 guesses are a failed power supply, failed logic board, or exhausted PRAM battery (I have never changed it). The first two may be a bit to pricey for me to consider replacing. If they are the problem, I may just settle for setting the computer to never sleep. Does this sound like it could be caused by the PRAM battery going out?
    Any advice would be greatly appreciated!
    Message was edited by: Joshua213

    My bad on not reporting back sooner. Indeed, replacing the PRAM battery did not fix the problem. The situation seems odd to me as I was able to sometimes wake the computer from sleep without it quitting while others times it dies. It does fine as long as it doesn't go to sleep. I can start it up and shut it down with no problems; additionally, it appears to do fine even when left on for long periods of time as long as it doesn't go to sleep. To be correct it doesn't seem to so much be the state of "sleeping", but the act of trying to wake it up from sleep. I don't think ventilation is a problem.
    What I have done is just set it to not sleep. We just shut it down once in awhile. Rather than forking out the money, I think I will just use this work around as long as it continues to work.

  • 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

    Please re-download and install the 10.7.3 update. You can locate it at 10.7.3 (Client Combo). Follow the on-screen instructions. Then test it out, if you still have the same problem please restart, when you hear the startup tone hold down the Option Key and then choose the Recovery Partition. Then open Disk Utilities and Repair Disk Permissions 2x. Then exit DU, restart normally and re-test.

  • IMac has empty blue screen on waking from sleep

    My iMac goes to a blue empty screen when waking from sleep. No login. No desktop shows up. Any ideas or explanations? I am working on clearing off hard drive space - currently about 100GB available on 1TB system. But I do not know if that could be a cause.
    Thanks for any help you can give.

    tritzer wrote:
    As far as resetting the SMT, my only option was to hold the power button down and force the system off anyway, since I couldn't see anything.
    I did reset the PRAM, which ended up being disastrous! Instead of encountering the problem each time the system went to sleep like what had been happening, after I reset the PRAM, it started doing it immediately during startup. I couldn't even get to the desktop. The computer was completely unusable!
    If I hadn't had a spare monitor around, I wouldn't have been able to do anything with my computer! Interestingly, the problem doesn't occur with my old Apple Studio Display, just my new Apple Cinema Display.
    You better revert to 10.5.4 and stay with it until this is resolved.

  • External monitor initially flashes on waking from sleep

    I recently upgraded to 10.4.8. My PowerBook is connected to an external monitor and now often flashes when I wake the machine from sleep. It takes a while too settle down but then works fine. If I wake from sleep without the external monitor, there are no problems. I had no problems using 10.1. Does anyone have a fix?
    G4 PowerBook (PowerBook6,1)   Mac OS X (10.4.8)   867 MHz

    I found the following article from Apple: TA20612. It reads as follows: 
    "The popping sound does not indicate any software issue or hardware failure. This is a normal part of hardware-software initialization after waking from sleep or during startup."
    I'm a bit skeptical. I think I would have noticed this on the old iMac. Since I haven't yet sold it, I'm going to try to arrange for some side-by-side testing. I'll update this thread when I have the results.

  • "Photoshop transparent background" after waking from sleep

    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.
    Is this the system freeze that folks have been talking about?

    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.

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