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Why does my iMac keep crashing? (panic reports provided)

Hello, my iMac has crashed twice now after installing new RAM.


The first panic report: http://pastebin.com/raw.php?i=ucxjEfbR

The second panic report: http://pastebin.com/raw.php?i=HGNWgzxb


The most recent panic attack happened overnight, so I'm not sure what was happening on my machine. I had Notes, Messages, Chrome and 1Password open at the time I think (based on what restarted).

iMac (27-inch, Late 2012), OS X Mountain Lion (10.8.2), Recently installed 32GB RAM

Posted on Feb 20, 2013 6:28 AM

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6 replies

Feb 20, 2013 3:28 PM in response to jon290

The chances are good the issue is related to your new RAM. This can be caused by 1 of 3 issues with RAM:


  1. Incorrect RAM, iMacs are fussy so be positive you install the correct RAM.
  2. Failed RAM, yes RAM can a does fail.
  3. Unseated RAM, remove and reseat.


Going forward please post the actual KP Logs, not links to them as they are not always viewable.

Feb 20, 2013 3:41 PM in response to rkaufmann87

Thanks for replying rkaufmann87.


  1. When purchasing the RAM I verified that it was compatible and intended for the late 2012 model iMacs.
  2. How could I know if my RAM was bad or failed? About This Mac -> More Info... -> System Report -> Hardware -> Memory reports each slot as a status of 'OK'. Is there a better way to verify the RAM?
  3. Would unseated RAM still show up as 'OK' or present in the system info as being installed?

Feb 20, 2013 4:09 PM in response to jon290

jon290 wrote:


Thanks for replying rkaufmann87.


  1. When purchasing the RAM I verified that it was compatible and intended for the late 2012 model iMacs.
  2. How could I know if my RAM was bad or failed? About This Mac -> More Info... -> System Report -> Hardware -> Memory reports each slot as a status of 'OK'. Is there a better way to verify the RAM?
  3. Would unseated RAM still show up as 'OK' or present in the system info as being installed?

I am assuming this is for a late 2012 27" iMac, the only late 2012 IMac's with user upgradeable RAM. If that is correct please post the exact specifications including the RAM model and manufactuer you bought so we can verify it's correct.

Feb 20, 2013 4:13 PM in response to jon290

jon290 wrote:


Thanks for replying rkaufmann87.


  1. When purchasing the RAM I verified that it was compatible and intended for the late 2012 model iMacs.
  2. How could I know if my RAM was bad or failed? About This Mac -> More Info... -> System Report -> Hardware -> Memory reports each slot as a status of 'OK'. Is there a better way to verify the RAM?
  3. Would unseated RAM still show up as 'OK' or present in the system info as being installed?
  1. Please provide the exact make, model and specifications of the RAM you purchased so we can verify it's correct. Also provide where you bought it.
  2. Refer to Baltwo's suggestion above.
  3. Unseated RAM can show up if it's partially seated, testing it is extremely simple, remove and reinstall and press it in firmly.

Why does my iMac keep crashing? (panic reports provided)

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