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Brand new iMac 2020 Kernel Panic...

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Nov 2, 2014
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New iMac 10-Core i9, 64GB RAM.....Simply browsing Safari....Machine became unresponsive and Panic occurred. Unbelievable. Set it up as new so its obviously an issue with the machine. Really shocked that it happened out of nowhere like that. What a bummer.
 
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There seems to be a lot of talk about Safari causing machine shutdowns lately... older machines and newer... I suspect Safari may be the culprit of your shutdown.
 
pmiles said:
There seems to be a lot of talk about Safari causing machine shutdowns lately... older machines and newer... I suspect Safari may be the culprit of your shutdown.
Click to expand...

Good to know. Safari was all I was using at the time and it froze and crashed.

Freaking Catalina.....

Edit, I'm starting to think its a hardware issue...
 
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pmiles said:
https://www.reddit.com/r/eGPU/comments/f9ufg0

One specific link to take a look at... take a look at the user comments in reply to this post.
Click to expand...

Yeah I read that, but those are with an eGPU connected to it. A two day old iMac probably shouldn't be having a Kernel panic out of the box. I haven't had a single one on my 2019 MacBook Pro or on my 2015 iMac. I'm beginning to think its actually a hardware issue. Its unacceptable for such an expensive machine and I guess I'm going to return it for another one. Really sucks.
 
Ah, welcome to the Mac. Think different ;)

Jokes aside, I've experienced kernel panics with all of my recent Macs and Catalina. Not too frequent, but every couple of months or so. My new iMac 2020 also crashed right after I had started it for the first time and after transferring my files from my MacBook Pro (10.15.6) using the migration assistant.
 
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So do you guys think I should be concerned here? This is a brand new iMac that I set up as new so I didn't migrate anything over from my older one. I never had a single Kernel Panic on my previous iMac and it has just caused me to rethink keeping this one if its something I should have legitimate concerns over.

If it happens again would you recommend I return it? My 16" MacBook Pro has never had this happen so I'm a little concerned.
 
RAWvJPG said:
Ah, welcome to the Mac. Think different ;)

Jokes aside, I've experienced kernel panics with all of my recent Macs and Catalina. Not too frequent, but every couple of months or so. My new iMac 2020 also crashed right after I had started it for the first time and after transferring my files from my MacBook Pro (10.15.6) using the migration assistant.
Click to expand...

Weird I’m running both a 2017 iMac and a 2018 Mac Mini both on Catalina latest and zero panics, the latter being on 24x7 and for former also having 3rd party RAM. Only curious thing is that the iMac does seem to take a long time to boot to login screen, but then again I’ve got a variety of TB3/USB3.1g2/3.0 drives on it, both MacOS and Win10 formats.
 
RAWvJPG said:
Ah, welcome to the Mac. Think different ;)

Jokes aside, I've experienced kernel panics with all of my recent Macs and Catalina. Not too frequent, but every couple of months or so. My new iMac 2020 also crashed right after I had started it for the first time and after transferring my files from my MacBook Pro (10.15.6) using the migration assistant.
Click to expand...

I guess what I'm more concerned about is that this iMac is literally two days old and was set up as new. I didn't want to do a transfer from my older iMac just avoid problems.
 
The link I gave was just one such post. There have been others with machines that aren't using eGPUs. And they've all crashed while Safari was running.

us.forums.blizzard.com

Freezing of screen (GPU crashes) retail and classic

Ever since 8.3 I have had problems with retail and classic freezing and causing he GPU to restart. It only happens when playing these 2 games. I am on latest Catalina (it has happened on past 2 versions of Catalina as well), all addons up to date. Specs and logs below. Becoming very aggravating...
us.forums.blizzard.com us.forums.blizzard.com

Have to scroll down a bit to find the comments about Safari being a possible culprit.
 
pmiles said:
The link I gave was just one such post. There have been others with machines that aren't using eGPUs. And they've all crashed while Safari was running.

us.forums.blizzard.com

Freezing of screen (GPU crashes) retail and classic

Ever since 8.3 I have had problems with retail and classic freezing and causing he GPU to restart. It only happens when playing these 2 games. I am on latest Catalina (it has happened on past 2 versions of Catalina as well), all addons up to date. Specs and logs below. Becoming very aggravating...
us.forums.blizzard.com us.forums.blizzard.com

Have to scroll down a bit to find the comments about Safari being a possible culprit.
Click to expand...

Ok, thank you. I just find it strange that I have never had this issue with any previous Mac and all of a sudden a new one has issues. I'm going to give it a few more days and if it happens again I'm returning it.
 
I had to take my first 2020 iMac back to Apple because the kernel panics increased in frequency until it would not boot after five days. This was an i9 3.6 10-core with 5700XT.

replacement iMac just arrived and is burning in now. No kernel panics yet, but it’s early. Downside is that I cannot post a geekbench 5 score over 8200, so this one is 20% slower than the first one. I’m likely going to take this one back as well.
 
mechapreneur said:
I had to take my first 2020 iMac back to Apple because the kernel panics increased in frequency until it would not boot after five days. This was an i9 3.6 10-core with 5700XT.

replacement iMac just arrived and is burning in now. No kernel panics yet, but it’s early. Downside is that I cannot post a geekbench 5 score over 8200, so this one is 20% slower than the first one. I’m likely going to take this one back as well.
Click to expand...
Did you add additional RAM to your second iMac? Are you aware that these 2020 iMacs are particular picky when it comes to RAM configurations? See: https://forums.macrumors.com/threads/memory-upgrade-troubleshooting-in-2020-27-inch-imacs.2249254/
 
mechapreneur said:
I had to take my first 2020 iMac back to Apple because the kernel panics increased in frequency until it would not boot after five days. This was an i9 3.6 10-core with 5700XT.

replacement iMac just arrived and is burning in now. No kernel panics yet, but it’s early. Downside is that I cannot post a geekbench 5 score over 8200, so this one is 20% slower than the first one. I’m likely going to take this one back as well.
Click to expand...
If the system is pretty new there are likely a bunch of background tasks performing which could affect your GB5 scores. After I got my new iMac (i7 with 32GB RAM from Crucial popped in) and all was settled, my MS score was around 8950, par for the course for the setup. Several days later I ran GB5 again for S&Gs and the score dropped to about 8300. Checked activity monitor and photoanalysisd was doing its thing again. After it completed I ran it again, score was back up to the normal range.
 
Turns out I'm a benchmark noob. Good points about background tasks, I was watching top (activity monitor) to make sure the system was quiet and waiting for spotlight to finish doing its thing. After I swapped in my OWC DIMMs, the first CPU benchmark hit 10,001 and ranges from 9698-10172. I'm no longer worried I've got a defective iMac.

Thanks for the suggestions!
 
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I had multiple KPs the first few days of owning the $1999 model. I returned it and the replacement has been flawless.
 
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