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  1. #1


    Member Since
    Jul 18, 2013
    Posts
    3
    Question iMAC keeps crashing
    Hi,

    Unfortunately for some time now, my 24" iMAC (Build 10K549) running MAC OS 10.6.8, has been crashing. I've posted to the Apple support forums without success so I was hoping to get some help here!?!

    I can use it without problems for ages until I do something a little more intensive and BLAM! One particular set of steps which seems to trigger it is accessing the "show top sites" within the Safari browser; the "top sites" opens, I scroll up and down then KA-POW!

    To cut a long story short I thought I had installed one too many applications and that something had got confused; I thought it was VMWARE Fusion. I've since formatted the hard drive and reinstalled MAC OS, but it keeps crashing!

    I've booted the computer into the Apple Hardware Test mode and run the short and long tests successfully. I therefore don't think it's a hardware problem, but what else is there?

    Can anyone help? I refuse to write of my beloved MAC.

  2. #2

    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
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    33,302
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    Do you do anything hardware related recently...like installed more ram?

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  3. #3


    Member Since
    Jul 18, 2013
    Posts
    3
    Question No hardware changes
    No. Absolutely no hardware changes. I've also booted into safe mode and run quite happily without seeing a crash!

    I had wondered whether keeping it in the kitchen and using it there has done something? I'm thinking of opening it up and giving it a hoover!!! Does anyone know if dust could cause such effects???

  4. #4

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    47,116
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, El Capitan
    Download the Mac SMART reporter and run the test. Let's see what it says about your hard drive.

  5. #5

    pigoo3's Avatar
    Member Since
    May 20, 2008
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    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    Quote Originally Posted by Dixonj View Post
    No. Absolutely no hardware changes. I've also booted into safe mode and run quite happily without seeing a crash!

    I had wondered whether keeping it in the kitchen and using it there has done something? I'm thinking of opening it up and giving it a hoover!!! Does anyone know if dust could cause such effects???
    If you have not made any hardware changes lately...and you can run in safe mode successfully...then my guess is you have some sort of software conflict causing the freezes.

    God only knows what has been installed on the computer (by the user)...that could be causing the conflict. But if the freezes only started recently...then most likely something was installed recently causing conflicts.

    And please let's go down the road of thinking that there is a virus of some sort...since that is very very unlikely on a Mac.

    If you are adventuresome...one way to totally test if it is a software conflict is:

    - take an external hard drive
    - install an OS on it (same version as you have on the internal HD)
    - boot the computer from the external HD
    - use the computer as normal to see if it freezes

    If no freezes...then there is almost definitely a software conflict of some sort on the internal HD.

    HTH,

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  6. #6

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Location
    Texas, where else?
    Posts
    26,455
    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    And what type of crash?

    The machine shuts down on it's own.
    Everything freezes but you can still move the cursor around.
    Everything freezes, including the cursor.
    You have a kernel panic - that screen that pops up telling you to shut down the machine in multiple languages.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  7. #7


    Member Since
    Jul 18, 2013
    Posts
    3
    The crash is a complete loss of power / a halt! No freeze at all.

    I've reinstalled MAC OS X and there isn't anything else installed. The crash still happens, so I'm not sure how it could be a software conflict!?!

    I'm going to look at MAC Smart Reporter as suggested to hopefully start ruling out components.

    Is anyone aware of any tools to monitor or test power?

  8. #8

    pigoo3's Avatar
    Member Since
    May 20, 2008
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    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    Quote Originally Posted by Dixonj View Post
    The crash is a complete loss of power / a halt! No freeze at all.
    Maybe I misinterpreted your iMac's crashing as freezing.

    So when you say your iMac is "crashing"/complete loss of power...are you saying that your computer completely shuts down...completely powers down randomly...display goes dark?

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  9. #9

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Location
    Texas, where else?
    Posts
    26,455
    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    First thing I'd look at if it's powering down on it's own would be the fans.

    Download iStatPro or smcFanControl to check temps and fan speed.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  10. #10


    Member Since
    Jan 22, 2010
    Location
    Victoria, BC
    Posts
    20,911
    Specs:
    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    If the OP really means that it completely loses power, then the problem could be that his power supply is dying when it gets taxed at all. This was a common problem on some iMac models, though I don't recall if the Intel 24" was one of them.

    It could be overheating but given his original description I'd say the power supply is starting to go.

  11. #11

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    21,196
    Specs:
    27" 5K iMac, 3.3GHz, 256GB Flash Storge, 16GB memory and OS X.11.3.
    Another vote for dodgy power supply.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  12. #12

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
    Posts
    28,764
    Specs:
    iMac 2010 27" QuadI7 OSX10.11, iMac 2008 OSX10.11, MBP Late2011OSX10.11 , iPhone 3GS Note 8!
    I have the 20" version of your 24". I have had that happen and I had to reset the SMC. Mine was doing that same thing and shutting down all of a sudden and this solved it completely. When the issue happened it was like someone pulled the plug from the wall. Give it a try.

    Resetting the SMC for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve

    Shut down the computer.
    Unplug the computer's power cord.
    Wait fifteen seconds.
    Attach the computer's power cord.
    Wait five seconds, then press the power button to turn on the computer.

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