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  1. #1


    Member Since
    Jan 20, 2014
    Posts
    17
    Late 2013 27" iMac crashing
    Hi,
    I am new here, but I was hoping I could get some insight into what's causing my iMac to crash. I bought it with the 2 x 4gb sticks of RAM, and I have since installed 2 x 8gb Kingston sticks. I understand this could be a problem, having different sizes and brands. I wonder if it is this, or if I have dodgy RAM sticks?

    The 2 8gb sticks are 1600 MHz DDR3.


    Here is my OS X Problem Report:

    Anonymous UUID: 9D43687C-251F-FB3F-A054-7E12103D305C

    Tue Jan 21 15:36:25 2014
    panic(cpu 0 caller 0xffffff800c0dc19e): Kernel trap at 0xffffff800c0d3b34, type 14=page fault, registers:
    CR0: 0x0000000080010033, CR2: 0xffffff82b0e43008, CR3: 0x0000000114406043, CR4: 0x00000000001606e0
    RAX: 0x0000000000000008, RBX: 0xffffff80423b6220, RCX: 0x0000000000000008, RDX: 0xffffff80423b6220
    RSP: 0xffffff82bee53ee0, RBP: 0xffffff82bee53f50, RSI: 0x0000000000000000, RDI: 0x0000000000000000
    R8: 0x0000000000000000, R9: 0x0000000000000000, R10: 0x00000ae0d28e5cd3, R11: 0x0000000000000246
    R12: 0x0000000000000000, R13: 0xffffff800c662d10, R14: 0xffffff8042655a40, R15: 0x00000001072cfc30
    RFL: 0x0000000000010246, RIP: 0xffffff800c0d3b34, CS: 0x0000000000000008, SS: 0x0000000000000010
    Fault CR2: 0xffffff82b0e43008, Error code: 0x0000000000000000, Fault CPU: 0x0

    Backtrace (CPU 0), Frame : Return Address
    0xffffff82bee53b70 : 0xffffff800c022f69
    0xffffff82bee53bf0 : 0xffffff800c0dc19e
    0xffffff82bee53dc0 : 0xffffff800c0f3606
    0xffffff82bee53de0 : 0xffffff800c0d3b34
    0xffffff82bee53f50 : 0xffffff800c43ddb9
    0xffffff82bee53fb0 : 0xffffff800c0f3e06

    BSD process name corresponding to current thread: coreaudiod

    Mac OS version:
    13B42

    Kernel version:
    Darwin Kernel Version 13.0.0: Thu Sep 19 22:22:27 PDT 2013; root:xnu-2422.1.72~6/RELEASE_X86_64
    Kernel UUID: 1D9369E3-D0A5-31B6-8D16-BFFBBB390393
    Kernel slide: 0x000000000be00000
    Kernel text base: 0xffffff800c000000
    System model name: iMac14,2 (Mac-27ADBB7B4CEE8E61)

    System uptime in nanoseconds: 11960721527578
    last loaded kext at 260394388211: com.apple.filesystems.msdosfs 1.9 (addr 0xffffff7f8e638000, size 65536)
    last unloaded kext at 320686135356: com.apple.filesystems.msdosfs 1.9 (addr 0xffffff7f8e638000, size 57344)
    loaded kexts:
    com.apple.filesystems.smbfs 2.0.0
    com.apple.driver.AudioAUUC 1.60
    com.apple.driver.AppleHWSensor 1.9.5d0
    com.apple.driver.AppleBluetoothMultitouch 80.14
    com.apple.driver.AGPM 100.14.11
    com.apple.driver.ApplePlatformEnabler 2.0.9d1
    com.apple.driver.X86PlatformShim 1.0.0
    com.apple.filesystems.autofs 3.0
    com.apple.iokit.IOBluetoothSerialManager 4.2.0f6
    com.apple.driver.AppleMikeyHIDDriver 124
    com.apple.driver.AppleHDA 2.5.3fc1
    com.apple.driver.AppleUpstreamUserClient 3.5.13
    com.apple.GeForce 8.1.8
    com.apple.driver.AppleIntelHD5000Graphics 8.1.8
    com.apple.driver.AppleMikeyDriver 2.5.3fc1
    com.apple.driver.AppleThunderboltIP 1.0.10
    com.apple.iokit.BroadcomBluetoothHostControllerUSB Transport 4.2.0f6
    com.apple.driver.AppleSMCLMU 2.0.4d1
    com.apple.driver.AppleIntelFramebufferAzul 8.1.8
    com.apple.iokit.IOUserEthernet 1.0.0d1
    com.apple.Dont_Steal_Mac_OS_X 7.0.0
    com.apple.driver.AppleHWAccess 1
    com.apple.driver.AppleLPC 1.7.0
    com.apple.driver.AppleBacklight 170.3.5
    com.apple.driver.AppleMCCSControl 1.1.12
    com.apple.AppleFSCompression.AppleFSCompressionTyp eDataless 1.0.0d1
    com.apple.AppleFSCompression.AppleFSCompressionTyp eZlib 1.0.0d1
    com.apple.BootCache 35
    com.apple.driver.AppleUSBHub 650.4.4
    com.apple.driver.XsanFilter 404
    com.apple.iokit.IOAHCIBlockStorage 2.4.0
    com.apple.driver.AppleSDXC 1.4.0
    com.apple.iokit.AppleBCM5701Ethernet 3.6.9b9
    com.apple.driver.AirPort.Brcm4360 800.21.45
    com.apple.driver.AppleAHCIPort 2.9.5
    com.apple.driver.AppleUSBXHCI 650.4.3
    com.apple.driver.AppleACPIButtons 2.0
    com.apple.driver.AppleRTC 2.0
    com.apple.driver.AppleHPET 1.8
    com.apple.driver.AppleSMBIOS 2.0
    com.apple.driver.AppleACPIEC 2.0
    com.apple.driver.AppleAPIC 1.7
    com.apple.nke.applicationfirewall 153
    com.apple.security.quarantine 3
    com.apple.driver.IOBluetoothHIDDriver 4.2.0f6
    com.apple.driver.AppleMultitouchDriver 245.13
    com.apple.kext.triggers 1.0
    com.apple.iokit.IOSerialFamily 10.0.7
    com.apple.driver.DspFuncLib 2.5.3fc1
    com.apple.vecLib.kext 1.0.0
    com.apple.iokit.IOAudioFamily 1.9.4fc11
    com.apple.kext.OSvKernDSPLib 1.14
    com.apple.iokit.IOAcceleratorFamily 98.7.1
    com.apple.nvidia.driver.NVDAGK100Hal 8.1.8
    com.apple.nvidia.driver.NVDAResman 8.1.8
    com.apple.iokit.IOBluetoothHostControllerUSBTransp ort 4.2.0f6
    com.apple.driver.AppleThunderboltEDMSink 1.2.1
    com.apple.driver.AppleHDAController 2.5.3fc1
    com.apple.iokit.IOHDAFamily 2.5.3fc1
    com.apple.iokit.IOAcceleratorFamily2 98.7.1
    com.apple.AppleGraphicsDeviceControl 3.4.12
    com.apple.driver.X86PlatformPlugin 1.0.0
    com.apple.driver.AppleSMBusPCI 1.0.12d1
    com.apple.iokit.IOSurface 91
    com.apple.iokit.IOBluetoothFamily 4.2.0f6
    com.apple.driver.AppleSMC 3.1.6d1
    com.apple.driver.IOPlatformPluginFamily 5.5.1d27
    com.apple.driver.AppleBacklightExpert 1.0.4
    com.apple.iokit.IONDRVSupport 2.3.6
    com.apple.driver.AppleSMBusController 1.0.11d1
    com.apple.iokit.IOGraphicsFamily 2.3.6
    com.apple.driver.AppleUSBHIDKeyboard 170.15
    com.apple.driver.AppleHIDKeyboard 170.15
    com.apple.iokit.IOUSBHIDDriver 650.4.4
    com.apple.iokit.IOSCSIBlockCommandsDevice 3.6.0
    com.apple.iokit.IOUSBMassStorageClass 3.6.0
    com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.0
    com.apple.driver.AppleUSBMergeNub 650.4.0
    com.apple.driver.AppleUSBComposite 650.4.0
    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 1.4.0
    com.apple.iokit.IOUSBUserClient 650.4.4
    com.apple.driver.AppleThunderboltNHI 1.9.2
    com.apple.iokit.IOThunderboltFamily 2.8.5
    com.apple.iokit.IOEthernetAVBController 1.0.3b3
    com.apple.iokit.IO80211Family 600.34
    com.apple.driver.mDNSOffloadUserClient 1.0.1b4
    com.apple.iokit.IONetworkingFamily 3.2
    com.apple.iokit.IOAHCIFamily 2.6.0
    com.apple.iokit.IOUSBFamily 650.4.4
    com.apple.driver.AppleEFINVRAM 2.0
    com.apple.driver.AppleEFIRuntime 2.0
    com.apple.iokit.IOHIDFamily 2.0.0
    com.apple.iokit.IOSMBusFamily 1.1
    com.apple.security.sandbox 278.10
    com.apple.kext.AppleMatch 1.0.0d1
    com.apple.security.TMSafetyNet 7
    com.apple.driver.AppleKeyStore 2
    com.apple.driver.DiskImages 371.1
    com.apple.iokit.IOStorageFamily 1.9
    com.apple.iokit.IOReportFamily 21
    com.apple.driver.AppleFDEKeyStore 28.30
    com.apple.driver.AppleACPIPlatform 2.0
    com.apple.iokit.IOPCIFamily 2.8
    com.apple.iokit.IOACPIFamily 1.4
    com.apple.kec.pthread 1
    com.apple.kec.corecrypto 1.0


    Hope somebody can help me digest all that info

    Cheers,
    Daniel

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,486
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    One sure way to find out is pull the two Kingston 8 GB modules and run the iMac with just the two 4 GB modules it shipped with.

    According to Mactracker and Apple, this is what your iMac can accept:

    Maximum Memory 32 GB
    Memory Slots 4 - 204-pin PC3-12800 (1600 MHz) DDR3 SO-DIMM


    The panic report does indicate a memory problem, so it's a good bet that either the Kingston modules are bad (one or two) and/or they're not seated properly. I recommend pulling them and reseating them first. If it still panics, send them back and buy memory from either Crucial or OWC.

  3. #3

    Exodist's Avatar
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    L2012 Mini, i7 2.6Ghz, 8GB RAM, 256GB SSD + 1TB HDD(fusion), BenQ 32" 2.5k QHD Display
    Quote Originally Posted by chscag View Post
    One sure way to find out is pull the two Kingston 8 GB modules and run the iMac with just the two 4 GB modules it shipped with........
    I agree.. That looks like a memory issue..

    I also agree with going through Crucial or getting Crucial Mac Certified RAM form Newegg or Amazon.

    Joe's Photo & Video Channel on YouTube
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  4. #4


    Member Since
    Jan 20, 2014
    Posts
    17
    Thanks for the replies.

    Will give that a go. I bought the RAM brand new, but back in November, so I am unsure if I can get a refund or not.

    Could it possibly be the pairing of 4's and 8's? Could that cause a problem like this?

  5. #5

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    21,998
    Specs:
    Imac 27" Retina 5K, 512GB Flash Storage, 3.3Ghz, 16GB memory, OS X.11.5.
    Give Kingston a miss and stick with OWC or Crucial memory. They are Mac specialists.
    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!

  6. #6

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,486
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    Could it possibly be the pairing of 4's and 8's? Could that cause a problem like this?
    No, that shouldn't cause the panics. It's either going to be a defective module or they're not seated correctly. As far as getting a refund, most memory has a lifetime warranty. As long as you didn't buy it from a seller on eBay or something like that, you should be able to get your money back.

  7. #7

    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
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    28,907
    Specs:
    iMac 2010 27" QuadI7 OSX10.11, iMac 2008 OSX10.11, MBP Late2011OSX10.11 , iPad Air, iPhone 3GS
    Just a note, and not to contradict others here but my experience over the last 10 years with Macs and Kingston Ram.

    I have never once in any Mac I have owned ever had a Kingston stick that was the right specs for the Mac that ever once caused a crash or anything else. All my RAM is Kingston except this last older iMac due to I got a better deal from OWC.

    I normally would 100% Back OWC RAM and always will, but just stating that fact. I had issues though with Other off brands and bought a replacement Kingston stick and never one issue. Is the Kingston RAM's specs exactly what Apple says to use for that model iMac?

    You could have a bad stick but that brand has never let me down here.

  8. #8

    chscag's Avatar
    Member Since
    Jan 23, 2008
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    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    @Dennis:

    His Kingston modules are the correct ones. Like I stated in my reply to him, it could be one bad module or they might not be seated properly. The late model iMacs have very tight memory slots and normally require a lot of "thumb pressure" to get them seated properly. I had that problem with my 2011 iMac. I actually had to get a soft cloth to use so I could push down hard enough to get the modules to seat (click in place). I haven't added memory to my 2013 27" iMac yet since it already has 8 GB installed by Apple.

  9. #9

    dtravis7's Avatar
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    Quote Originally Posted by chscag View Post
    @Dennis:

    His Kingston modules are the correct ones. Like I stated in my reply to him, it could be one bad module or they might not be seated properly. The late model iMacs have very tight memory slots and normally require a lot of "thumb pressure" to get them seated properly. I had that problem with my 2011 iMac. I actually had to get a soft cloth to use so I could push down hard enough to get the modules to seat (click in place). I haven't added memory to my 2013 27" iMac yet since it already has 8 GB installed by Apple.
    I agree with you 100%. I was just posting my experiences with Macs and kingston Ram.

    The 2 slots on my late 2007 Aluminum iMac are VERY tight. Had to press very hard to be sure they seated all the way like you mentioned.

  10. #10


    Member Since
    Jan 20, 2014
    Posts
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    Interesting information on the Kingstons. I have found of late that the iMac was crashing at lease once per day, and since removing the 2 Kingstons it hasn't crashed once.

    I will try pushing the sticks in a bit harder, I might even try one for a few days, then the other.

    I guess if it still crashes, I will contact the store and try some new sticks.

    Thanks for the information.

  11. #11

    dtravis7's Avatar
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    Keep us posted. A Bad stick can come from anywhere. I have seen bad Crucial and OWC. More rare than most but it can happen.

  12. #12

    Exodist's Avatar
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    Quote Originally Posted by DPOC View Post
    Interesting information on the Kingstons. I have found of late that the iMac was crashing at lease once per day, and since removing the 2 Kingstons it hasn't crashed once.

    I will try pushing the sticks in a bit harder, I might even try one for a few days, then the other.

    I guess if it still crashes, I will contact the store and try some new sticks.

    Thanks for the information.
    I can't remember if the iMac has 2 or 4 DIMM slots. Do you have any other RAM installed on the system while the kingstons are installed? If you do, are they kingstons and also are they the same size (GB per chip wise)? Then last question also is are they the same exact voltage?

    Any of these variables can cause RAM issues. The RAM may be fine, may be compatible specs, may even run fine when just new RAM is installed.. But mixed ram often does cause issues. But also do do what you mentioned and try each stick individually just incase one of the modules is faulty.. It doesn't happen often, but it does.


    Cheers..

    Joe's Photo & Video Channel on YouTube
    Lightroom, Photoshop, FCP, Gear Reviews and more...
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  13. #13


    Member Since
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    Quote Originally Posted by dtravis7 View Post
    Keep us posted. A Bad stick can come from anywhere. I have seen bad Crucial and OWC. More rare than most but it can happen.
    Thanks, I will

  14. #14

    dtravis7's Avatar
    Member Since
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    Good info Exodist!! I have seen that even on PC hardware.

  15. #15


    Member Since
    Jan 20, 2014
    Posts
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    Quote Originally Posted by dtravis7 View Post
    Keep us posted. A Bad stick can come from anywhere. I have seen bad Crucial and OWC. More rare than most but it can happen.
    Quote Originally Posted by Exodist View Post
    I can't remember if the iMac has 2 or 4 DIMM slots. Do you have any other RAM installed on the system while the kingstons are installed? If you do, are they kingstons and also are they the same size (GB per chip wise)? Then last question also is are they the same exact voltage?

    Any of these variables can cause RAM issues. The RAM may be fine, may be compatible specs, may even run fine when just new RAM is installed.. But mixed ram often does cause issues. But also do do what you mentioned and try each stick individually just incase one of the modules is faulty.. It doesn't happen often, but it does.


    Cheers..
    It has 4 slots, it came with the Apple 2 x 4gb sticks. I have them in the top 2 slots:

    BANK 0/DIMM0 - Apple 4GB DDR3 1600 Mhz
    BANK 1/DIMM0 -
    BANK 0/DIMM1 - Apple 4GB DDR3 1600 Mhz
    BANK 1/DIMM1 -

    This setup is causing no issues, but I need more RAM.

    BANK 0/DIMM0 - Apple 4GB DDR3 1600 Mhz
    BANK 1/DIMM0 - Kingston 8GB DDR3 1600 Mhz
    BANK 0/DIMM1 - Apple 4GB DDR3 1600 Mhz
    BANK 1/DIMM1 - Kingston 8GB DDR3 1600 Mhz

    This setup caused my issues.


    Perhaps I should try a few days with only the Kingstons installed? Removing the Apple RAM might fix my problem, as you mention having the different size sticks.

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