Imac Hang up at shutdown

Last night I went apple shut down like normal via the apple menu. After that everything went away like but the top tool bar and my desktop picture. Then the little OS X process watch that appears at start up was there processing something. I thought it might just be taking awhile so I left to do other things. When came back maybe 10 mins later the watch was still going in cycles. Then the Imac's fan buzz at full throttle like it does if I use firewire mode to transfur something, not knowing what do and never encountering this before i just un plugged it. My question is has this ever happened to any one else and was this a Benin function or maybe something bad

My iMac 24" has been having this issue lately. I assumed it was something that I had dorked up. I am a recent switcher...we got the Mac on January 5th. That was by far, the best decision I have ever made...well, when it comes to computers, it was...
Anyway, when I try to shut down the computer just hangs with the little spinning thingie in the middle of the screen. By spinning thingie, I don't mean the beachball. I mean the spinning thing that usually means that it is working. Anyway, I first realized this the other night when I attempted to shut down. I walked away, went upstairs, and got into bed. I came down the next morning to find my baby still spinning...and the monitor still on. I was sad that she'd been up all night. Lately, if I need to shut down I just let it get to the spinner, then I wait about a minute, then hold the power button in to force the shutdown. I amsure that this isn't the best, but I want to shut down occasionally to clear the machine. Anyway, I'll probably need to check for a background program, but I typicall shut down all programs first, then shut down the machine. I'll have to find out more about looking for background operations.
Anyone have any other suggestions, or are experiencing the same problems?
Thanks!
-John

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    Since 6/2/12, Firefox has been crashing most every day on my iMAC.  Using Firefox help, checked plug-ins and several needed update, so I started wwith Adobe Flash and began having worse problems.  First, it did not seem to download, then the system would "hang" (spinning rainbow) for VERY long time (over 1/2 hour or overnight).  After shutdown and unplug power for 10 minutes, tried to start up and now it takes over 30 minutes with lots of hang time. Finally followed firefox help suggestion to "revert to default".  Not much help and of course favorites bar is gone. Has still crashed at least once since 6/15/12.
    Tried using Safari instead of Firefox and performance was HORRID-- very slow and lots of hangups lsting 10 minutes and more.
    Via my iPad, I looked at Skype and history showed several entries for "URGENT ONLINE REPAIR" and others starting 6/2/12 (Same date as most recent string of Firefox crashes.  Possibly related??
    Any ideas?

    No smoking guns in the panic log that I can see. Does it KP in Safe Boot? Hold shift down at startup chime. Give it much longer than a regular bootup.
    http://www.thexlab.com/faqs/kernelpanics.html
    http://macs.about.com/od/usingyourmac/qt/Troubleshooting-Os-X-Kernel-Panics.htm
    Faulty RAM is often a cause. Test the RAM with Memtest.
    To test the memory, get memtest and run it in single user mode, where it will test as much memory as possible, more than with the OS loaded.
    You can get memtest + directions from the link below. However, ignore running it from Terminal. Instead, boot into SU Mode, Cmd-s at the startup chime. (Best to startup from a full shutdown.)
    At the prompt, simply type /usr/bin/memtest all 3 -L (From this link It will be installed in /usr/bin/) Then hit return. This will run three loops of memtest and create a log in Console in Utilties.
    If you want to run memtest longer, which may be advisable, since RAM errors can be very elusive, just remove the "all 3" which will give you /usr/bin/memtest -L and hit return. It will keep testing until you quit it.
    If you want to quit the test, just hit control-c
    When finished, you can just type in "reboot" and hit return.
    http://osxdaily.com/2011/05/03/memtest-mac-ram-test/
    Direct link for the download.
    http://cdn.command-tab.com/2008/memtest_422.zip

  • IMac hanging on boot after 10.10.3

    Greetings all,
    After upgrading to 10.10.3, my iMac (12,1) started freezing regularly, necessitating a forced shutdown and restart. After two days of this, it failed to boot up at all, but would automatically power down about 1/3 of the way through the boot process.
    I detached all devices except the keyboard and mouse and tried booting into Safe Mode with the same results (shut down). I then booted into Recovery Mode and ran Disk Repair. It found that there were errors with the disk (I did not make note of them at time), and that I should backup what I could (already done via Time Machine), reformat the HDD, and restore the backup.
    I did this and everything seemed to work OK. However, upon returning home from work, I found that my iMac was frozen again (the mouse moved the cursor, but neither the Dock or any apps would respond). I tried rebooting again, only to find it hanging about halfway through the boot process.
    I tried booting into Safe Mode again, but it would hang at the same point. I booted into Recovery Mode and ran checked the disk and everything is fine. So I then tried booting in Verbose mode, and got to this at the fsck_hfs point:
    Executing fsck_hfs (version hfs-235)
    Warning: couldn't block sleep during cache updae
    Warning: proceeding w/o DiskArb
    /dev/disk0s2 on / (hfs, local, journaled)
    AppleAHCIDiskQueueManager: :setPowerState(alpha-numerical series, 3 -> 2) timed outafter 101096 ms
    And that is where we are stuck.
    Of course, this thing is, like, ONE MONTH past the AppleCare warranty's expiration date.
    Any advice would be appreciated, or even any input as to whether the problem is with the system, or with the HDD. This is the first iMac I've had in since 2001 that hasn't last me six years or more, so I am kind of bummed... =(

    Well, I was able to throw a new copy of Yosemite onto an externall HDD and booted from that just fine so, as rkaufmann87 surmised, it is likely an hdd failure. I'm just surprised that there is so little available documentation about this type of error message (as seen when fsck is run).
    rkauffmann87 -  Getting to an Apple store is not a viable option... =(
    seräkare - I'm guessing that we are in the same boat. Are you able to, or even have access to the parts, to try doing what I did above?
    Lucky for me, I got to perform HDD replacement surgery on the same model of iMac at my work and, except for the known fan issue (which is resolved by using third-party fan control managers), it is working just fine. I have yet to do the same for my iMac, but my boss was kind enough to let me install my backup on one of work's spare iMacs to use at home until I have the chance to do so (just weighing my options about what new HDD/SSD to install).
    The steps are incredibly easy and can be found at iFixit.

  • 24" imac hanging with color wheel of dead using Lightroom 1.3 and Canon 10D

    Trying to download for the first time my pictures from my Canon 10D using Adobe LightRoom 1.3 under Leopard 10.5.1 everytime after +/- 30 pictures the program and the finder hangs option command escape also does not do anything anymore only the color wheel spinning. Only solution a hard reboot.
    Using Leopard 10.5.1 Lightroom 1.3 on my macbook pro (15" led display version) all the picutures from the camera get downloaded without any problems.
    Under all other conditions the iMac so far has been without problems. Is this aproblem in the video driver?
    Thanks,
    Raimond

    Trying to download for the first time my pictures from my Canon 10D using Adobe LightRoom 1.3 under Leopard 10.5.1 everytime after +/- 30 pictures the program and the finder hangs option command escape also does not do anything anymore only the color wheel spinning. Only solution a hard reboot.
    Using Leopard 10.5.1 Lightroom 1.3 on my macbook pro (15" led display version) all the picutures from the camera get downloaded without any problems.
    Under all other conditions the iMac so far has been without problems. Is this aproblem in the video driver?
    Thanks,
    Raimond

  • After upgrading to Yosemite my IMac  Hangs

    After upgrading to Yosemite my IMac will hang usually on a given App and I have to force a power down and reboot to get it back in operation.
    Anyone else having this problem?

    russellfrompalm desert wrote:
    I've checked the App Store, no updates available. However, McSoltaire isn't listed
    in the available solitaire apps.
    Do you think I should download/buy new solitaire & hearts apps?
    Did you get McSolitaire from the Mac App Store, if not it would not be available there. You should contact the developer to see if they have any updates or you can also look in MacUpdates.com

  • IMac hanging... is my Hard Drive dead?

    Last week my 20 inch iMac (bought mid 2007, just after launch)started hanging weirdly. For no apparent reason, I got the Spinning Beachball of Death and everything was frozen. The dock was appearing when I moused over but no response, not possible to click or right click on anything. No response from the force to quit shortcut either. I have Menumeters in my menubar so could see that the CPU was idle and there was no access to the hard disk (up or down) but I could hear it do its little 'reading data' ordinary noise, like forever. So I rebooted using the power button. Everything went fine but it hung back on me after less than a minute. I was in the kitchen using bluetooth mouse and keyboard, so I unplugged the iMac and went to my computer room to try with the wired keyboard and mouse, just to be sure. Booted, SBoD'd after 30 seconds. Re-Booted, hanged on the grey apple/spinning gear screen. Read this forum, learned about the SMC reset thing. Tried the thing while thinking 'Hey, I just did that when I switched rooms'. Nevermind. Booted! Yay! I was able to actually use my computer for something like 30 minutes before the next hang. I even had the time to refresh my Time Machine backup(wich will come handy if, like I apprehend, my HDD is the culprit). But now I'm back in the Reboot/Beachball loop of h*. I also tried booting from the Leopard install disk to run disk utility but it didn't see my hard drive.
    So, what do you think?
    any answers?
    any questions?
    thanks in advance
    Gabriel
    Message was edited by: GabLeCrabe

    I tried safe mode but the problem was still there. Then I tried to run disk utility again but from the install disk that came with my iMac (OS 10.4.10), not from the Leopard install disk. It worked! I could see my Hard Drive. So I ran a repair disk routine, but it said everything was fine. Then I tried to repair the permissions and it had a very long list of bad permissions to repair. I had never seen such a long list, and I never tought for a second that could be the cause of my troubles, you know, with all the debate over permissions being a big deal or not, I came to neglect them.
    So now my iMac has been running without a hitch for something like 12 hours. I'll keep it under observation for a few days just to be shure, but it still is a big relief to have it back...
    @seanlon: the sound I was talking about was really the ordinary Hard drive sound, not the 'hurry-up-and-save-what-you-can-before-it-dies' clicking and grinding sound that I experienced a few years ago with another computer. I also think a computer with mechanical parts like a HHD and an optical drive can never be completely silent. Maybe a SSD Macbook Air is, I don't know...

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