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mac mac mac

macrumors regular
Original poster
Oct 8, 2008
Bellevue, WA
My 2011 iMac 27" crashes a lot. Ever since I bought it new back in 12/2011, it's been crashing at least 1 to 2 times a week. It happens typically when I wake it from sleep, or while the computer is being shut down. I called AppleCare numerous times, but they don't really have an answer for me. At first, I thought it was Lion, but since then, I have re-installed the OS a few times, and now running ML, which I have also re-installed a few times. No luck so I don't think it's the OS nor software (it crashes even before I installed any 3rd party software). My system is up-to-date, and have tried PRAM reset, repair disk, repair permission. The only thing I added to my system is adding 4 sticks of 4GB RAM (16 GB total). I ran the Apple diagnostic tool a few times, including the extensive test, and did not find any hardware issue. I only have a Drobo 2 connected to my iMac via FW800. I really don't know what's wrong with my computer. My previous Mac (2008 MBP) was running solid, but this iMac is driving me insane.

My iMac just crashed again. Just before it gave me the kernel panic, screen saver was running, and I was entering my password to log back in. Then grey screen of death. Below is the crash report. Do any of you know what it means? Any help is greatly appreciated. Thank you.

Interval Since Last Panic Report: 137428 sec
Panics Since Last Report: 1
Anonymous UUID: B604CBA1-EDC5-A235-CBDA-C88ADC25EE4B

Thu Jun 13 20:14:39 2013
panic(cpu 0 caller 0xffffff8006cb8655): Kernel trap at 0xffffff80277dc280, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0xffffff80277dc280, CR3: 0x00000000095db000, CR4: 0x00000000000606e0
RAX: 0xffffff80277dc280, RBX: 0xffffff80383f5900, RCX: 0x0000000000000000, RDX: 0xffffff80277dc280
RSP: 0xffffff81d92cbec8, RBP: 0xffffff81d92cbef0, RSI: 0xffffff8027810300, RDI: 0xffffff80277eeec0
R8: 0x0000000000000000, R9: 0x0000000000000002, R10: 0xffffff80277dce80, R11: 0x0000000000000206
R12: 0xffffff80072e2070, R13: 0xffffff80383f5900, R14: 0xffffff8027810300, R15: 0x0000000000000000
RFL: 0x0000000000010282, RIP: 0xffffff80277dc280, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0xffffff80277dc280, Error code: 0x0000000000000011, Fault CPU: 0x0 Kernel NX fault

Backtrace (CPU 0), Frame : Return Address
0xffffff81d92cbb60 : 0xffffff8006c1d626
0xffffff81d92cbbd0 : 0xffffff8006cb8655
0xffffff81d92cbda0 : 0xffffff8006cce17d
0xffffff81d92cbdc0 : 0xffffff80277dc280
0xffffff81d92cbef0 : 0xffffff8007043700
0xffffff81d92cbf30 : 0xffffff800702d296
0xffffff81d92cbf70 : 0xffffff8007031fc9
0xffffff81d92cbfb0 : 0xffffff8006cb3137

BSD process name corresponding to current thread: kernel_task

Mac OS version:

Kernel version:
Darwin Kernel Version 12.4.0: Wed May 1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64
Kernel UUID: 896CB1E3-AB79-3DF1-B595-549DFFDF3D36
Kernel slide: 0x0000000006a00000
Kernel text base: 0xffffff8006c00000
System model name: iMac12,2 (Mac-942B59F58194171B)

System uptime in nanoseconds: 536617562088
last loaded kext at 263400134999: 1.8.1 (addr 0xffffff7f88f04000, size 65536)
last unloaded kext at 323642302444: 1.8.1 (addr 0xffffff7f88f04000, size 57344)
loaded kexts:
com.attotech.driver.ATTOiSCSI 3.4.1b1
com.TrustedData.driver.VendorSpecificType00 1.7.0 75.19 1.9.5d0 4.1.4f2 4.1.4f2 4.1.4f2 1.60 100.12.87 122 2.3.7fc4 3.5.10 8.1.2 2.3.7fc4 3.0 2.0.3d0 170.2.5 1.0.0 4.1.4f2 8.1.2 1.0.8 1.6.0 1.1.11 1.0.0d1 7.0.0 3.4.5 8.1.2 1.0.0 3.1.7 320.15 3.5.5 404 1.0.0d1 1.0.0d1 34 2.3.1 5.5.5 3.6.1b4 4.9.6 600.72.2 2.5.2 5.5.0 1.7 1.7 1.5 1.8 1.9 1.7 1.6 196.0.0 4.0.39 2.1 196.0.0 235.29 170.2 4.1.4f2 170.2 10.0.6 2.3.7fc4 1.8.9fc11 1.6 1.0 1.0.4 4.1.4f2 1.0.11d0 74.5.1 2.2.5 1.1.8 1.1.8 1.0.11d0 8.1.2 8.1.2 86.0.4 4.1.4f2 3.4.5 2.3.7 2.3.7fc4 2.3.7fc4 2.3.7 3.1.4d2 1.0.0 5.3.0d51 3.5.5 1.7 1.7.1 1.7.1 2.5.1 1.8.9 1.8.9 1.8.9 1.2.6 3.5.1 5.2.5 3.5.5 2.1.1 3.5.5 4.2.2 5.5.5 5.2.5 5.5.5 1.7.8 2.4.0 1.0.2b1 4.5.5 530.4 3.0 2.3.1 5.6.0 1.7 1.8.1 1.1 220.3 1.0.0d1 7 345 1.8 28.21 1.7 2.7.3 1.4 1.0
Model: iMac12,2, BootROM IM121.0047.B1F, 4 processors, Intel Core i7, 3.4 GHz, 16 GB, SMC 1.72f2
Graphics: AMD Radeon HD 6970M, AMD Radeon HD 6970M, PCIe, 2048 MB
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x029E, 0x434D534F344758334D314131333333433920
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x029E, 0x434D534F344758334D314131333333433920
Memory Module: BANK 0/DIMM1, 4 GB, DDR3, 1333 MHz, 0x029E, 0x434D534F344758334D314131333333433920
Memory Module: BANK 1/DIMM1, 4 GB, DDR3, 1333 MHz, 0x029E, 0x434D534F344758334D314131333333433920
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x9A), Atheros 9380:
Bluetooth: Version 4.1.4f2 12041, 2 service, 18 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: ST31000528AS, 1 TB
Serial ATA Device: HL-DT-STDVDRW GA32N
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 3
USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0xfa130000 / 5
USB Device: MT1956, 0x0e8d (MediaTek Inc.), 0x1956, 0xfa131000 / 7
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0xfa111000 / 6
USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x850b, 0xfa200000 / 2
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfd110000 / 4
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 3
FireWire Device: Rev2, Drobo, 800mbit_speed


macrumors member
Nov 23, 2011
Try it with the original memory.
Also check to see if you have added any software since it started to do this.
Have you checked the video card drivers.
Have you done a HDD diagnostic check?
Are there any overheating problems, do the fans come up in speed?

Maybe again a complete system rebuild.


macrumors 6502
May 13, 2005
Sounds like a memory issue to me also. I agree with trying the original memory for awhile and see if anything changes.


macrumors regular
Jun 9, 2013
In the Sandbox
+1 on the memory. If you got the timings off or are using crappy RAM, then you're probably going to have issue. Revert back to the original RAM and see how it goes for a while.

mac mac mac

macrumors regular
Original poster
Oct 8, 2008
Bellevue, WA
I don't think it's software related. It crashes even right after I clean installed the OS, and before installing any other programs. And I don't hear any fans kicking up so I don't think it's overheating.

How do I check the video card driver or run a HDD diagnostic check? Is it part of the Apple diagnostic tool? I know Apple did a recall on the 1TB hard drive for iMac that were shipped before 7/2011, but I don't think it applies to my machine since I got it in 12/2011.

I don't know what I did with the original RAM. I just submitted a warranty request. Corsair will ship me a replacement. Hopefully it'll resolve the issue. Thanks everyone.
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