Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

Ethosik

Contributor
Original poster
Oct 21, 2009
7,785
6,708
I have been trying to figure out why Catalina gives me 4+ kernel panics a day. I recently updated my Steam and am getting constant freezes with this too under Mojave. I found out I am only experiencing this issue when I have both of my extra monitors connected. If I just have one connected, it works fine. I am testing Catalina with just one connected and so far I am not experiencing the issue.

I have my iMac screen and two extras connected via a DisplayPort to USB-C cable. Is there a better way to connect them?

Also, I have the 2019 iMac i9, 2TB SSD, 64GB of RAM and Vega 48.

Edit: I can definitely confirm that my kernel panics are gone - at least the ones I was experiencing 4+ times a day. My question is, why doesn’t it like two external displays?
 
Last edited:

Ethosik

Contributor
Original poster
Oct 21, 2009
7,785
6,708
Already tested. No issues. It’s definitely the second monitor that’s the cause. Do I need an eGPU to support more monitors?
 

theluggage

macrumors 604
Jul 29, 2011
7,476
7,315
Already tested. No issues. It’s definitely the second monitor that’s the cause. Do I need an eGPU to support more monitors?
The iMac definitely supports two external displays. Sounds like Steam and/or Catalina is the problem.
 

Ethosik

Contributor
Original poster
Oct 21, 2009
7,785
6,708
The iMac definitely supports two external displays. Sounds like Steam and/or Catalina is the problem.

Do you know why this would be an issue? I just got two new DisplayPort to USB-C cables.

It does not matter which of the two cables, which of the two monitors, or which of the two USB-C ports on the iMac. If I have both external displays connected, both Steam and Catalina have issues. Do you know what would be causing this issue? I would like to have three displays at the same time and this is very irritating!
 

alien3dx

macrumors 68020
Feb 12, 2017
2,188
525
sidecar(ipad mini 2019)... samsung monitor base imac 2017.. 3

** intel chipset
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.