To those with Kernel Panics on iMac 5k

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To those with Kernel Panics on iMac 5k

Hey Apple community!

After suffering for quite some time, and after much trial and error. I believe I can accurately theorize on the root of the problem that many of us have endured.

I went through all my hardware ( disconnected external peripherals ), software ( reformatted ); removed third-party RAM ( Crucial ).

The word going around the Internet was that Apple RAM and Third-Party RAM did not play well together on the iMac5k.

This was a great hypothesis, however it is false ( to my knowledge and experience ). The culprit is the RAM Apple has sent out with the iMac5k:

HMT451S6AFR8A 4GB 1RX8 PC3L - 12800S

The base model, which I purchased; arrives with two of these installed, on slots 1 and 3. Slots 2 and 4 are both empty.

I am currently running my iMac 5k with both Crucial 8GB, at 16GB ( instead of the 24GB, which I would have if the Apple RAM

worked as intended ).

For those of you who continue experiencing errors, and you've attempted all other way arounds; try this one.

It has worked for me.

Cheers,

Paul

PS. Apple send me some RAM, thanks 🙂

iMac with Retina 5K display, OS X Yosemite (10.10.4)

Posted on Jul 5, 2015 9:30 PM

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Answer 1

Best reply

babowa

Level 9

78,109 points

Jul 5, 2015 9:37 PM in response to paul-vincent

Unfortunately, these are user to user forums and Apple does not participate here. If the original RAM is defective, please contact Apple and/or take your Mac and the RAM to your nearest Genius Bar for a free evaluation and troubleshooting. If you are still covered by the warranty, they will gladly replace it if it is defective.

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Answer 2

markwmsn

Level 6

15,017 points

Jul 5, 2015 9:41 PM in response to paul-vincent

Could you tell us why you think the Apple RAM is per se the problem rather than the "playing together" theory?

If you can get the Apple Ram to fail without third-party RAM, can't you get it replaced under warranty?

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Answer 3

paul-vincent Author

Level 1

0 points

Jul 5, 2015 9:45 PM in response to markwmsn

Hey Mark,

When I first received my iMac and went through installation instructions, it was having the same issue. This was before I had installed Crucial RAM.

I recently removed the Crucial RAM and operated my iMac on a clean re-install; and ran it for 48 hours. I continued to have Kernel Panics.

I adjusted the placement of the Apple RAM, from 1-3, to 1-2, to 2-4, to 3-4. It continued to crash.

I have removed the Apple RAM, and installed the Crucial RAM on 1-2. I has been running for 48 hours, without a hitch.

Cheers,

Paul

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Answer 4

markwmsn

Level 6

15,017 points

Jul 5, 2015 9:50 PM in response to paul-vincent

If your Mac was having the problem when you first received your Mac and before you installed the third-party RAM, Apple should replace it under warranty.

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