Skip navigation

Mid-2011iMac, 3.1Ghz i5, 4 Gb ram has recently started "hanging" during operation.

395 Views 7 Replies Latest reply: Sep 6, 2013 9:42 PM by John Galt RSS
Don Kemp Level 1 Level 1 (0 points)
Currently Being Moderated
Sep 5, 2013 3:47 PM

Mid-2011iMac, 3.1Ghz i5, 4 Gb ram has recently started "hanging" during operation. I'm typically running FMP 12, Safari with multiple open tabs, mail, calendar and message. I will randomly get the "beach ball", more frequently as the day goes on. Activity Monitor show nothing unusual, but system.log is filled with "memorystatus_thread: idle exiting pid #### [SleepServiceD]" messages. Trying to copy a section of log and get it onto my iPad so I can post it. Not running MacKeeper, or any other such utilities.

Mac Pro, Mac OS X (10.6.8), Server
  • John Galt Level 7 Level 7 (33,090 points)

    If you have not done so already, back up your data because what you describe may indicate an impending hard disk failure.


    Confirm you are running the OS X version in your profile (10.6.8). This was posted in the Mountain Lion forum.


    1. Run Apple Hardware Test by booting from your original grey Applications DVD while holding the d key. Any result other than "No trouble found" indicates a hardware failure that must be addressed first. Then,
    2. Boot from your original grey System Install DVD and choose Disk Utility from the Utilities menu. Select your startup volume (usually named "Macintosh HD") and from the First Aid tab, click the Repair Disk button. Reply with the results of any errors it reports in red.
    MacBooks  iMacs  iPads  AirPorts, OS X Mountain Lion,  28 years Apple!
  • John Galt Level 7 Level 7 (33,090 points)

    In that case the Internet version of Apple Hardware Test can be invoked on your iMac by holding option d at startup, and you can boot OS X Recovery to run Disk Utility. No discs are required.


    The relevant system.log excerpts would be helpful.


    Mozy could be responsible for the periodic unresponsiveness. I know of no subscription-based offsite backup services that function well on a Mac.

    MacBooks  iMacs  iPads  AirPorts, OS X Mountain Lion,  28 years Apple!
  • John Galt Level 7 Level 7 (33,090 points)

    The logs show the periodic "hangs" you describe but the underlying cause is not evident. To help determine that I suggest the following, in no particular order of importance:


    • Safe Mode or "Safe Boot" is a troubleshooting mode that bypasses all third party system extensions and loads only required system components. Read about it: Starting up in Safe Mode
      • Note that a Mac does not behave normally in Safe Mode. Screen redraws won't be as smooth, certain network functions are disabled, and some programs (iTunes for example) will not work at all. Read the above link for a more thorough description. Restarting your Mac normally will restore its previous environment.
      • If the periodic "hangs" do not occur in Safe Mode, it's a clue that will advance troubleshooting. The cause must still be determined though.
    • Creating a temporary account to isolate user-specific problems: Isolating an issue by using another user account
      • Log our of your normal account, log in to the temporary one, and determine if there is any change.
      • Delete the temporary account when you are finished testing.
    • Memory limitations: Using Activity Monitor to read System Memory and determine how much RAM is being used
      • Installing more memory is beneficial but is not a panacea for resource-hogging or poorly written programs.
    • Consider posting the results of EtreCheck in accordance with the following.
      • EtreCheck will collect and present a summary of certain system information that may reveal a potential cause.


    Apple Support Communities contributor etresoft wrote a very useful app to quickly gather certain system information that may help point to a cause of this problem. Go to his website, download and run EtreCheck:



    Etrecheck will be in your Downloads folder. Open it from there. You may see the following dialog box:

    Screen Shot 2013-03-26 at 2.26.25 PM.png

    Click Open - etresoft contributes to this forum frequently and can be considered a trustworthy developer.


    It will take a moment to run as it collects its data.


    Copy and paste its output in a reply.


    Do not be concerned about anything that says "Problem" or "failed".


    EtreCheck was designed to remove any personal information (such as your computer's name and serial numbers) but if you see anything that looks like an email address or any other personal information that should not be divulged to others, please delete or obscure that information when you post the reply.


    When you are finished with EtreCheck, quit the program. It occupies very little space, and you can keep it or drag it to the Trash as you wish.

    MacBooks  iMacs  iPads  AirPorts, OS X Mountain Lion,  28 years Apple!
  • John Galt Level 7 Level 7 (33,090 points)

    Safe Mode should be instructive.


    Google Desktop may be causing the random hangs; I suspect it only because Google has yet to demonstrate the ability to write anything for OS X that is not a resource hog.


    In addition,

    • Mozy is in fact installed
    • Make sure Wireshark is the 64 bit version
    • Western Digital SmartWare does nothing beneficial and has been known to cause problems.


    There are several other processes launched at startup with which I am not familiar (FernLightning, "themha"???). Not all of them may be compatible with Mountain Lion, so if the periodic unresponsiveness does not occur in Safe Mode, your task is to search their respective developers' websites for updates, or methodically uninstall them.


More Like This

  • Retrieving data ...

Bookmarked By (0)


  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.