My imac keeps turning off and restarting by itself

My iMac keeps turning off and restarting by itself.  Any ideas why and how to fix it?  Thanks. 

Hi ...
Try Resetting the System Management Controller (SMC)

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    hello all
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    What worked for me, is going to the camera app, switch to video, turn on flash, and record.  Let the phone record for about 10 minutes.  (your phone will probably keep reseting itself) but that is okay, let it reset, and go back the the camera app and repeat.  what you are supposed to do is let the phone sit there and wait for the back to feel sort of hot. stop recording at about 8 minutes and plug your phone into itunes, it should be charging, and once you do so you can then set your phone into DFU mode.  This might not help you, or it will.  I just fixed my iphone today, that had the same problem as you.  so keep trying and it will come back to normal again!  Cheers!

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    Hi Friend,
    I have faced this issue yesterday, but just for one app. Then I went to Notifications Center, turn all the settings of that app to off then turn it on again. Rebooth the device (press and hold Home and Sleep button simultaneally until turns off the device and appears the Apple logo), then everything works at a glance.
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  • Imac spontaneously turns off and restarts with error message

    Any help would be appreciated.  Started yesterday.  Already booted in safe mode and reinstalled using time machine to before it started to happen.  This is the error message:
    Interval Since Last Panic Report:  223748 sec
    Panics Since Last Report:          1
    Anonymous UUID:                    4BFE30DA-BB47-97F2-BCA7-E31FAAE8DF9A
    Wed Oct  2 17:35:28 2013
    panic(cpu 2 caller 0xffffff802b2fa591): "hfs_UNswap_BTNode: invalid backward link (0x00013ad5 == 0x00013ad5)\n"@/SourceCache/xnu/xnu-2050.48.11/bsd/hfs/hfs_endian.c:297
    Backtrace (CPU 2), Frame : Return Address
    0xffffff811ce532b0 : 0xffffff802b01d636
    0xffffff811ce53320 : 0xffffff802b2fa591
    0xffffff811ce53370 : 0xffffff802b2ef474
    0xffffff811ce533b0 : 0xffffff802b12160a
    0xffffff811ce534a0 : 0xffffff802b11e5b3
    0xffffff811ce53550 : 0xffffff802b120c7f
    0xffffff811ce535a0 : 0xffffff802b31909f
    0xffffff811ce535d0 : 0xffffff802b31d1e6
    0xffffff811ce53640 : 0xffffff802b304138
    0xffffff811ce536e0 : 0xffffff802b1190e4
    0xffffff811ce53750 : 0xffffff802b351c19
    0xffffff811ce53f50 : 0xffffff802b3e97ba
    0xffffff811ce53fb0 : 0xffffff802b0cf453
    BSD process name corresponding to current thread: mds
    Mac OS version:
    12F37
    Kernel version:
    Darwin Kernel Version 12.5.0: Mon Jul 29 16:33:49 PDT 2013; root:xnu-2050.48.11~1/RELEASE_X86_64
    Kernel UUID: B1B58405-A2B2-3C44-B25D-495053D52AB5
    Kernel slide:     0x000000002ae00000
    Kernel text base: 0xffffff802b000000
    System model name: iMac13,2 (Mac-FC02E91DDD3FA6A4)
    System uptime in nanoseconds: 755668164542
    last loaded kext at 293671024990: com.apple.filesystems.afpfs          10.0 (addr 0xffffff7fad27b000, size 348160)
    last unloaded kext at 422819023524: com.apple.filesystems.msdosfs          1.8.1 (addr 0xffffff7fac8f5000, size 57344)
    loaded kexts:
    com.Logitech.Unifying.HID Driver          1.2.0
    com.Logitech.Control Center.HID Driver          3.6.0
    com.apple.filesystems.afpfs          10.0
    com.apple.nke.asp_tcp          7.1.0
    com.apple.driver.AppleHWSensor          1.9.5d0
    com.apple.driver.AudioAUUC          1.60
    com.apple.iokit.IOUserEthernet          1.0.0d1
    com.apple.driver.AGPM          100.13.12
    com.apple.driver.ApplePlatformEnabler          2.0.7d2
    com.apple.driver.X86PlatformShim          1.0.0
    com.apple.driver.AppleUpstreamUserClient          3.5.12
    com.apple.driver.AppleMikeyHIDDriver          124
    com.apple.iokit.IOBluetoothSerialManager          4.1.7f2
    com.apple.GeForce          8.1.6
    com.apple.driver.AppleIntelHD4000Graphics          8.1.6
    com.apple.driver.AppleHDA          2.4.7fc2
    com.apple.Dont_Steal_Mac_OS_X          7.0.0
    com.apple.driver.AppleMikeyDriver          2.4.7fc2
    com.apple.driver.AppleBacklight          170.3.5
    com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport          4.1.7f2
    com.apple.driver.AppleSMCLMU          2.0.3d0
    com.apple.driver.ApplePolicyControl          3.4.5
    com.apple.driver.AirPort.Brcm4331          615.20.17
    com.apple.driver.AppleSMBusPCI          1.0.11d1
    com.apple.driver.AppleLPC          1.6.3
    com.apple.driver.AppleMCCSControl          1.1.11
    com.apple.driver.AppleIntelFramebufferCapri          8.1.6
    com.apple.iokit.AppleBCM5701Ethernet          3.6.2b4
    com.apple.filesystems.autofs          3.0
    com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
    com.apple.BootCache          34
    com.apple.driver.XsanFilter          404
    com.apple.iokit.IOAHCIBlockStorage          2.3.5
    com.apple.driver.AppleUSBHub          623.4.4
    com.apple.driver.AppleSDXC          1.4.3
    com.apple.driver.AppleAHCIPort          2.6.6
    com.apple.driver.AppleUSBEHCI          621.4.6
    com.apple.driver.AppleUSBXHCI          630.4.5
    com.apple.driver.AppleACPIButtons          1.8
    com.apple.driver.AppleRTC          1.5
    com.apple.driver.AppleHPET          1.8
    com.apple.driver.AppleSMBIOS          1.9
    com.apple.driver.AppleACPIEC          1.8
    com.apple.driver.AppleAPIC          1.7
    com.apple.driver.AppleIntelCPUPowerManagementClient          214.0.0
    com.apple.nke.applicationfirewall          4.0.39
    com.apple.security.quarantine          2.1
    com.apple.driver.AppleIntelCPUPowerManagement          214.0.0
    com.apple.security.SecureRemotePassword          1.0
    com.apple.iokit.IOSurface          86.0.4
    com.apple.iokit.IOSerialFamily          10.0.6
    com.apple.nvidia.gk100hal          8.1.6
    com.apple.NVDAResman          8.1.6
    com.apple.iokit.IOAcceleratorFamily          74.15
    com.apple.driver.DspFuncLib          2.4.7fc2
    com.apple.iokit.IOAudioFamily          1.9.2fc7
    com.apple.kext.OSvKernDSPLib          1.12
    com.apple.driver.AppleBacklightExpert          1.0.4
    com.apple.iokit.IOBluetoothHostControllerUSBTransport          4.1.7f2
    com.apple.driver.AppleHDAController          2.4.7fc2
    com.apple.iokit.IOHDAFamily          2.4.7fc2
    com.apple.driver.AppleGraphicsControl          3.4.5
    com.apple.iokit.IONDRVSupport          2.3.7
    com.apple.iokit.IO80211Family          530.5
    com.apple.driver.X86PlatformPlugin          1.0.0
    com.apple.driver.AppleSMC          3.1.5d4
    com.apple.driver.IOPlatformPluginFamily          5.4.1d11
    com.apple.driver.AppleThunderboltEDMSink          1.2.0
    com.apple.driver.AppleSMBusController          1.0.11d1
    com.apple.iokit.IOGraphicsFamily          2.3.7
    com.apple.iokit.IOEthernetAVBController          1.0.2b1
    com.apple.iokit.IONetworkingFamily          3.0
    com.apple.kext.triggers          1.0
    com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.6
    com.apple.driver.AppleThunderboltDPOutAdapter          2.5.0
    com.apple.driver.AppleThunderboltDPInAdapter          2.5.0
    com.apple.driver.AppleThunderboltDPAdapterFamily          2.5.0
    com.apple.driver.AppleThunderboltPCIDownAdapter          1.3.2
    com.apple.driver.IOBluetoothHIDDriver          4.1.7f2
    com.apple.iokit.IOBluetoothFamily          4.1.7f2
    com.apple.iokit.IOUSBHIDDriver          623.4.0
    com.apple.driver.AppleUSBMergeNub          621.4.6
    com.apple.driver.AppleUSBComposite          621.4.0
    com.apple.driver.AppleThunderboltNHI          1.9.2
    com.apple.iokit.IOThunderboltFamily          2.7.7
    com.apple.iokit.IOUSBUserClient          630.4.4
    com.apple.iokit.IOAHCIFamily          2.5.1
    com.apple.iokit.IOUSBFamily          630.4.5
    com.apple.driver.AppleEFINVRAM          2.0
    com.apple.driver.AppleEFIRuntime          2.0
    com.apple.iokit.IOHIDFamily          1.8.1
    com.apple.iokit.IOSMBusFamily          1.1
    com.apple.security.sandbox          220.3
    com.apple.kext.AppleMatch          1.0.0d1
    com.apple.security.TMSafetyNet          7
    com.apple.driver.DiskImages          345
    com.apple.iokit.IOStorageFamily          1.8
    com.apple.driver.AppleKeyStore          28.21
    com.apple.driver.AppleACPIPlatform          1.8
    com.apple.iokit.IOPCIFamily          2.8
    com.apple.iokit.IOACPIFamily          1.4
    com.apple.kec.corecrypto          1.0
    Model: iMac13,2, BootROM IM131.010A.B05, 4 processors, Intel Core i5, 3.2 GHz, 8 GB, SMC 2.11f14
    Graphics: NVIDIA GeForce GTX 675MX, NVIDIA GeForce GTX 675MX, PCIe, 1024 MB
    Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3431554638424455352D474E2D4620
    Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x02FE, 0x45424A3431554638424455352D474E2D4620
    AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xF4), Broadcom BCM43xx 1.0 (5.106.98.100.17)
    Bluetooth: Version 4.1.7f2 12718, 3 service, 21 devices, 3 incoming serial ports
    Network Service: AirPort, AirPort, en1
    Serial ATA Device: APPLE HDD WDC WD10EALX-408EA0, 1 TB
    USB Device: USB Receiver, 0x046d  (Logitech Inc.), 0xc52b, 0x14300000 / 1
    USB Device: hub_device, 0x8087  (Intel Corporation), 0x0024, 0x1a100000 / 2
    USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x8511, 0x1a110000 / 3
    USB Device: hub_device, 0x8087  (Intel Corporation), 0x0024, 0x1d100000 / 2
    USB Device: hub_device, 0x0424  (SMSC), 0x2412, 0x1d180000 / 3
    USB Device: BRCM20702 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x1d181000 / 4
    USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x828b, 0x1d181300 / 6

    Boot into Recovery mode, launch Disk Utility, select the startup volume ("Macintosh HD," unless you gave it a different name), and run Repair Disk (not  Repair Permissions.) If any problems are found, repeat. Then reboot as usual.
    If you don't already have a current backup, you must back up your data, if possible, before you take the above step. You may be able to back up, even if the system isn't bootable. Ask if you need guidance.

  • My iphone 4s turns off and restarts after a few seconds or minutes to establish a FaceTime call. I've tried "Restore iPhone" but the same thing keeps happening. Any solution?

    My iphone 4s turns off and restarts itself a few seconds or minutes after when I establish a FaceTime call. I've tried "Restore iPhone" from iTunes but the same thing keeps happening. Any solution?

    Settings > General > Reset > Reset Network Settings
    Also, if this only happens with one Wi-Fi network, power cycle that Wi-Fi router.
    Basic troubleshooting from the User's Guide is reset, restart, restore (first from backup then as new).  Try each of these in order.

  • Why does my nano keep turning off and on when it is connected to my computer?

    When i connect my nano to my computer the nano says that it is connected and nothing happens in Itunes. Then when the nano keeps turning off and on while it is plugged into my computer. What can i do to make itunes recognize my nano so i can add new music?

    Please try the following:
    Move System Configuration Files
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    Go to /Library/Preferences
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    Restart your Mac. (Note: OS X will rebuild the files that are now sitting on your desktop. If this doesn't resolve the issue, you can move the folder back to it's original location.)

  • TS3274 My Ipad display is stuck on portrait mode. I tried the toggle switch, turning off and restart and just now backed up into Itunes and restored and still is stuck on portrait mode and it won't flip to landscape mode. Is this a hardware problem?

    My Ipad display is stuck on portrait mode. I tried the toggle switch, turning off and restart and just now backed up into Itunes and restored and still is stuck on portrait mode and it won't flip to landscape mode. Is this a hardware problem?

    Has lock rotation been accidentally enabled within the control centre? If you swipe up the screen is there a circle with a lock symbol & if so is is greyed out or white - if white it is enabled.

  • My iPad is not charging when I pluged in and its keep turning off and on (it just shows the apple logo). I even changed the charger so what can I do to start my iPad?

    My iPad is not charging when I pluged in and its keep turning off and on (it just shows the apple logo). I even changed the charger so what else can I do to start my iPad?

    FORCE IPAD INTO RECOVERY MODE
    1. Turn off iPad
    2. Turn on computer and launch iTunes (make sure you have the latest version of iTune)
    3. Plug USB cable into computer's USB port
    4. Hold Home button down and plug the other end of cable into docking port.
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    5. Release Home button.
    ON COMPUTER
    6. iTunes has detected iPad in recovery mode. You must restore this iPad before it can be used with iTunes.
    7. Select "Restore iPad"...
    Note:
    1. Data will be lost if you do not have backup
    2. You must follow step 1 to step 4 VERY CLOSELY.

  • My ipod touch will not charge or register in itunes.  It keeps turning off and then showing the apple logo?

    My ipod touch will not charge or register in itunes.  It keeps turning off and then shows the apple logo.  I have tried holding down the button and plugging it in.  It will show the red battery for a second and then turn off?  Any other suggestions?

    I have checked for problems with the connections, but from what i can see with the naked eye, nothing appears abnormal. It is very strange, and very sudden. It just stopped in the middle of a charge. The apple store is my next step. I just wanted to see if anyone on here had some extremely eye-opening solution or check. thanks though!
    I'm also within warranty, so it's not a huge problem.

  • My sound keeps turning off and then gonas back on and also its ending my calls when i got full sigal

    Hi 
    could you please help me as my sound keeps turning off and then gonas back on and also its ending my calls when i got full sigal

    Hi john00000001,
    Welcome to the Support Communities!
    The article below may be able to help you with this.
    Click on the link to see more details and screenshots. 
    iPhone: Receiver and call audio quality issues
    http://support.apple.com/kb/ts5196
    Cheers,
    - Judy

  • How do I fix my iPhone 4 that's keeps turning off and on

    My phone keeps turning off and on. It will show the boot logo and it will dim like its going to the lock screen, but then it will show the loading wheel when turning off. Then the process repeats. I trued restoring but in recovery mode its gets error 21 at the step of getting iPhone ready to restore. Then I tried to do it in DFU mode and it gets stuck in waiting for IPhone. I have tried changing cables that hasn't really worked and I tried updating everything. Please help!!!!!!

    Sounds like you have a hardware problem. Take it to an Apple Store for evaluation.

  • My ipod touch 5G keeps turning off and on after i turned off everything in mobilesubstrate settings on SB setting!

    Ok, so i just jailbroke, and my ipod was going into safe mode a lot on its own, so i searched online for a solution, and that was to find the problem cydia tweak i downloaded, one of the ways was to got into the mobilesubstrate settings and single out the tweak, so i turned everything off but one, then my ipod shut off, and now it keeps turning off and on non stop, but never goes to the lockscreen, and the time for this startup and shutdown is prolonged! please Help!!!  i tried to restore with itunes but it keeps turning on and off!

    Jailbreaking voids the Apple warranty and also means that you will not get any support from Apple, including from this Apple forum. Jailbreaking can't be discussed in this Apple forum.
      Unauthorized modification of iOS has been a major source of instability, disruption of services, and other issues

  • My iphone keeps turning off and powers itself again

    my iphone keeps turning off and powers itself again

    Hello dantecruso,
    Thanks for using Apple Support Communities.
    There are some troubleshooting steps I'd like you to follow in the article below in order to resolve this issue you're experiencing.
    Will not turn on, will not turn on unless connected to power, or unexpected power off
    Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
    Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion. Learn about LCIs and corrosion.
    Connect the iPhone to the iPhone's USB power adapter and let it charge for at least ten minutes.
    After at least 30 minutes, if:
    The home screen appears: The iPhone should be working. Update to the latest version of iOS if necessary. Continue charging it until it is completely charged and you see this battery icon in the upper-right corner of the screen Then unplug the phone from power. If it immediately turns off, seek service.
    The low-battery image appears, even after the phone has charged for at least 20 minutes: See "iPhone displays the low-battery image and is unresponsive" symptom in this article.
    Something other than the Home screen or Low Battery image appears, continue with this article for further troubleshooting steps.
    If the iPhone did not turn on, reset it while connected to the iPhone USB power adapter.
    If the display turns on, go to step 4.
    If the display remains black, go to next step.
    Connect the iPhone to a computer and open iTunes. If iTunes recognizes the iPhone and indicates that it is in recovery mode, attempt to restore the iPhone. If the iPhone doesn't appear in iTunes or if you have difficulties in restoring the iPhone, see this article for further assistance.
    If restoring the iPhone resolved the issue, go to step 4. If restoring the iPhone did not solve the issue, seek service.
    iPhone: Hardware troubleshooting
    http://support.apple.com/kb/ts2802
    Take care,
    Alex H.

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