iMac Intel 27". EMC 2309 (Late 2009, Core 2 Duo 3.06 or 3.33 GHz), EMC 2374 (Late 2009, Core i5 2.66 GHz or Core i7 2.8 GHz)

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Did the SSD Replacement - Worked Well - Now Crashing Hard

iMac 27" EM2309

I installed the SSD optical drive kit in my 2009 27" iMac with Core i5 processor. The SSD is a Samsung EVO 850. Worked amazingly for a few months. I used the SSD for the OS.

Unfortunately, now I am getting intermittent crashes which are bad crashes - the whole systems freezes and is unresponsive. The only way to get the computer back up is to hold onto the power button and do a hard-restart.

I wonder whether one of the incremental updates to Mac OS Sierra is the culprit and is no longer playing well with the SSD?

It is really unfortunate as the computer is now essentially unusable for doing any important work as I lose everything when these crashes occur.

I cannot pinpoint factors that lead to a crash, but it seems to happen mostly when browsing in Safari.

Anyone else have a similar problem with this drive and kit? Thanks!

Answered! View the answer I have this problem too

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Do you still have the HD installed? Are you able to run diagnostics {from start up press - Option-D} does it tell you anything?

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Thanks for the replies. I still have the originally hard drive installed but the OS is on the SSD in the optical drive bay with the iFixit mounting bracket. I followed the instructions to a T. Like I said, it worked perfectly for a few months. I have no fan problems at all - in fact, when it crashes the computer is totally silent and is not under heavy load at all. And yes, sorry, the iMac is a 27" late 2009 with 2.66 ghz core i5. I wish there was a way I could reproduce the crash but I can't. Also when I hold option-D at startup nothing happens.

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I should have followed up on my post earlier - I reinstalled OS X and it seems to have fixed the problem - everything seems to be working well again. No crashes since the reinstall.

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The 2009 EMC is a Core 2 Duo, either a 3.06 or 3.33. The EMC 2374 is either a i5 or i7.

Do you have run away fan issues? Did you address the temperature sensor issue when replacing the hard drive?

If not, here is your solution:

https://eshop.macsales.com/item/OWC/DIDI...

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Mike will be eternally grateful.
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