Krumpinator

Q: imac mid 2011 21.5 shutting down by itself

2 days ago my imac started to turn off by itself, and when it does so it will not turn back on for a few minutes. i have monitored the temps right before shut downs and it is in safe numbers, around 40-60 celcius, the shutdown cause says 0 when i look in the console. also tried resetting the smc or whatever its called and no luck, also tried plugging it in different places but same issue. ive done countless research and i cant seem to find a fix, im also out of warranty so i want to avoid bringing this sucker in. Is it that the power supply is going bad?  please can anyone help me out

Posted on Aug 17, 2016 10:15 AM

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Q: imac mid 2011 21.5 shutting down by itself

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  • by den.thed,

    den.thed den.thed Aug 17, 2016 10:41 AM in response to Krumpinator
    Level 7 (27,395 points)
    Aug 17, 2016 10:41 AM in response to Krumpinator

    To properly reset the SMC, see > Reset the System Management Controller (SMC) on your Mac - Apple Support

    (try that again a time or two)

     

    Run the > Apple Hardware Test - Apple Support

     

    Run > http://etrecheck.com/ and report the results.

     

    What temp monitor are you using and what component(s) does it monitor...?

    (post a screenshot of the read out)

     

    FWIW I use > http://www.crystalidea.com/macs-fan-control on my iMac and Mac Mini's.

  • by Allan Jones,

    Allan Jones Allan Jones Aug 17, 2016 10:55 AM in response to Krumpinator
    Level 8 (35,044 points)
    iPad
    Aug 17, 2016 10:55 AM in response to Krumpinator

    In spite of the temps you see reported, your symptoms sounds heat-related. Have you checked the air intakes on the bottom edge of the case. We have two iMacs with that case design and we must clean the dust from the vents every 4-5 months to maintain temperature control.

     

    Have you run Apple Diagnostics to see if any fans or sensors are not working? Info here:

     

    Using Apple Diagnostics - Apple Support

     

    EDIT: Sorry, den.thed...got interrupted while composing and did not see your response.

  • by den.thed,

    den.thed den.thed Aug 17, 2016 11:03 AM in response to Allan Jones
    Level 7 (27,395 points)
    Aug 17, 2016 11:03 AM in response to Allan Jones

    No problem Allan, same thing happens to me from time to time.

  • by Krumpinator,

    Krumpinator Krumpinator Aug 17, 2016 11:11 AM in response to den.thed
    Level 1 (4 points)
    Desktops
    Aug 17, 2016 11:11 AM in response to den.thed

    I Ran the more simple apple hardware test but nothing came up, I will have to try the extended one when I get home and I'm using istatspro to monitor, and yes to me it completely sounds like a overheating issue and I'll check the vents too. I've had it for 5 years and this is the first time I've ran in to the problem

  • by den.thed,

    den.thed den.thed Aug 17, 2016 11:33 AM in response to Krumpinator
    Level 7 (27,395 points)
    Aug 17, 2016 11:33 AM in response to Krumpinator

    Shutdown, disconnect it from the power, lay it face down on a soft cloth and gently vacuum off the bottom intake area instead of blowing. Blowing will only drive the dust bunnies deeper into impossible places to get at. If it's really dusty, it might also be a good idea to remove the RAM cover and clean that area out.

  • by Krumpinator,

    Krumpinator Krumpinator Aug 17, 2016 1:18 PM in response to den.thed
    Level 1 (4 points)
    Desktops
    Aug 17, 2016 1:18 PM in response to den.thed

    here is the screenshot from istats https://gyazo.com/51196afc98b9630645fea52e1549959a

     

    EtreCheck version: 3.0.1 (304)

    Report generated 2016-08-17 13:15:53

    Download EtreCheck from https://etrecheck.com

    Runtime 2:01

    Performance: Excellent

     

     

    Click the [Support] links for help with non-Apple products.

    Click the [Details] links for more information about that line.

     

     

    Problem: Computer is restarting

     

     

    Hardware Information: ⓘ

        iMac (21.5-inch, Mid 2011)

        [Technical Specifications] - [User Guide] - [Warranty & Service]

        iMac - model: iMac12,1

        1 2.5 GHz Intel Core i5 CPU: 4-core

        12 GB RAM Upgradeable - [Instructions]

            BANK 0/DIMM0

                4 GB DDR3 1333 MHz ok

            BANK 1/DIMM0

                4 GB DDR3 1333 MHz ok

            BANK 0/DIMM1

                2 GB DDR3 1333 MHz ok

            BANK 1/DIMM1

                2 GB DDR3 1333 MHz ok

        Bluetooth: Old - Handoff/Airdrop2 not supported

        Wireless:  en1: 802.11 a/b/g/n

     

     

    Video Information: ⓘ

        AMD Radeon HD 6750M - VRAM: 512 MB

            iMac 1920 x 1080

     

     

    System Software: ⓘ

        OS X El Capitan 10.11.6 (15G31) - Time since boot: less than an hour

     

     

    Disk Information: ⓘ

        WDC WD5000AAKS-402AA0 disk0 : (500.11 GB) (Rotational)

            EFI (disk0s1) <not mounted> : 210 MB

            KrumpMac (disk0s2) / : 39.25 GB (18.80 GB free)

            Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB

            BOOTCAMP (disk0s4) /Volumes/BOOTCAMP : 460.00 GB (181.72 GB free)

     

     

        HL-DT-STDVDRW  GA32N   ()

     

     

    USB Information: ⓘ

        Astro Gaming Inc. ASTRO MixAmp Pro           

        Apple Computer, Inc. IR Receiver

        Apple Card Reader

        Apple Inc. FaceTime HD Camera (Built-in)

          USB Keyboard

        Apple Inc. BRCM2046 Hub

            Apple Inc. Bluetooth USB Host Controller

     

     

    Thunderbolt Information: ⓘ

        Apple Inc. thunderbolt_bus

     

     

    Gatekeeper: ⓘ

        Mac App Store and identified developers

     

     

    Kernel Extensions: ⓘ

            /System/Library/Extensions

        [not loaded]    net.osrom.kext.Disabler (1.0.1 - 2016-08-16) [Support]

        [not loaded]    org.voodoo.driver.VoodooHDA (2.8.7 - SDK 10.6 - 2016-08-16) [Support]

     

     

    System Launch Agents: ⓘ

        [not loaded]    8 Apple tasks

        [loaded]    160 Apple tasks

        [running]    70 Apple tasks

     

     

    System Launch Daemons: ⓘ

        [not loaded]    47 Apple tasks

        [loaded]    161 Apple tasks

        [running]    82 Apple tasks

     

     

    Launch Agents: ⓘ

        [running]    com.bjango.istatmenusagent.plist (2016-08-17)

        [running]    com.bjango.istatmenusnotifications.plist (2016-08-17)

        [running]    com.bjango.istatmenusstatus.plist (2016-08-17)

        [not loaded]    com.teamviewer.teamviewer.plist (2016-07-06)

        [not loaded]    com.teamviewer.teamviewer_desktop.plist (2016-07-06) [Support]

     

     

    Launch Daemons: ⓘ

        [running]    com.bjango.istatmenusdaemon.plist (2016-08-17) [Support]

        [loaded]    com.teamviewer.Helper.plist (2016-07-06) [Support]

        [not loaded]    com.teamviewer.teamviewer_service.plist (2016-07-06)

        [running]    net.exirion.ssdfanctrl.plist (2013-10-31)

     

     

    User Login Items: ⓘ

        iTunesHelper    Application  (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

     

     

    Internet Plug-ins: ⓘ

        Default Browser: 601 - SDK 10.11 (2016-08-16)

        QuickTime Plugin: 7.7.3 (2016-08-16)

     

     

    3rd Party Preference Panes: ⓘ

        None

     

     

    Time Machine: ⓘ

        Time Machine not configured!

     

     

    Top Processes by CPU: ⓘ

            36%    mdworker(11)

            32%    TeamViewer_Desktop

            16%    WindowServer

             8%    Skype

             8%    kernel_task

     

     

    Top Processes by Memory: ⓘ

        898 MB    kernel_task

        270 MB    TeamViewer_Desktop

        184 MB    Skype

        184 MB    mdworker(11)

        98 MB    com.apple.WebKit.WebContent

     

     

    Virtual Memory Information: ⓘ

        8.43 GB    Free RAM

        3.56 GB    Used RAM (1.11 GB Cached)

        0 B    Swap Used

     

     

    Diagnostics Information: ⓘ

        Aug 17, 2016, 01:10:18 PM    Self test - passed

  • by den.thed,

    den.thed den.thed Aug 17, 2016 2:12 PM in response to Krumpinator
    Level 7 (27,395 points)
    Aug 17, 2016 2:12 PM in response to Krumpinator

    What did the air intakes look like and how did the cleaning go...?

     

    I don't see anything that obvious in the stat screenshot except for the fan speeds. Is that something you just started doing or have you been running the speeds up for awhile? Because if you have or are, then it will cause dust to collect at even a faster rate.

     

    Other than some moderate CPU usage by mdworker and TeamViewer, the EtraCheck report looks OK.

     

    Although, I don't think I've ever seen anyone that had their drive partitioned with only 40GB for OS X and 460GB for Bootcamp. Which leads up to the next question, is it shutting down while in OS X, Windows or both...?

  • by Krumpinator,

    Krumpinator Krumpinator Aug 17, 2016 2:12 PM in response to den.thed
    Level 1 (4 points)
    Desktops
    Aug 17, 2016 2:12 PM in response to den.thed

    didnt get to clean, it is actually my gfs computer and i'm trying to help, she doesn't have a vacuum lol and she only could wipe the vents to clean anything on the outside, fan speed i changed today to see if i can stop it if it was a overheating issue but it still happened. and its happening on both sides the windows and mac

  • by den.thed,

    den.thed den.thed Aug 17, 2016 2:20 PM in response to Krumpinator
    Level 7 (27,395 points)
    Aug 17, 2016 2:20 PM in response to Krumpinator

    I would use caution in speeding up the fans. All it will do is suck the dust bunnies deeper into it's innards.

     

    FWIW, at this point I think that your girl friend should make an appointment with your local service provider ASAP and have it looked at. Mac desktops Service Answer Center - Apple Support

  • by Krumpinator,

    Krumpinator Krumpinator Aug 17, 2016 3:56 PM in response to den.thed
    Level 1 (4 points)
    Desktops
    Aug 17, 2016 3:56 PM in response to den.thed

    she just finished the extended test and no trouble found, what can this mean if nothing is coming up? is it hardware related or something else

  • by Krumpinator,

    Krumpinator Krumpinator Aug 17, 2016 6:00 PM in response to Krumpinator
    Level 1 (4 points)
    Desktops
    Aug 17, 2016 6:00 PM in response to Krumpinator

    booted comp in safe mode and it still restarts, need answers