Resolved 5K iMac Crashing & Instability

redheeler

macrumors 604
Original poster
Oct 17, 2014
7,663
7,509
A few days ago my iMac froze up and crashed, I posted about it here. Since then it has happened again several times, and often webpages in Safari and Opera will crash as well.

Has anyone else been having this problem, or is it just me? I updated to 10.11.5 not too long ago, and I also upgraded the RAM to faster 2133 MHz earlier this month. However, the crashing only started last Tuesday.
 

AFEPPL

macrumors 68030
Sep 30, 2014
2,644
1,570
England
Well you could roll back each of the changes one by one to see if that improves stability...
But in all honesty, that my experience of OS X for the last few years it not really been stable and I've made no changes.

edit i don't have an iMac, but basic trouble shooting.
 
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jerwin

Suspended
Jun 13, 2015
2,895
4,646
A few days ago my iMac froze up and crashed, I posted about it here. Since then it has happened again several times, and often webpages in Safari and Opera will crash as well.

Has anyone else been having this problem, or is it just me? I updated to 10.11.5 not too long ago, and I also upgraded the RAM to faster 2133 MHz earlier this month. However, the crashing only started last Tuesday.

You could boot into hardware diagnostic mode.

https://support.apple.com/en-us/HT202731
 
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redheeler

macrumors 604
Original poster
Oct 17, 2014
7,663
7,509
You could boot into hardware diagnostic mode.

https://support.apple.com/en-us/HT202731
Thanks for the suggestion, I hadn't even thought about running the Apple Hardware Test to be honest. It found an issue with memory (PPM002). Not sure why it lasted two weeks without an issue...

I'll have to make sure the RAM is seated correctly. Sure hope it's not that one of the sticks went bad.
 
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redheeler

macrumors 604
Original poster
Oct 17, 2014
7,663
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Update: It appears that's exactly what it is, one of the sticks has gone bad. I'll have to contact the Amazon seller and ask for a return. Thanks again for the suggestion @jerwin.
 
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