[gnachman]

I have five monitors. When it works, it's great. The other 5% of the time it's a giant pain in the butt. I don't know why this part of macOS is so incredibly buggy. It often forgets the arrangement, the HDR setting, and the refresh rate.

I wrote a little program to detect when it breaks and set it back, but they don't have APIs for refresh rate and HDR so it's only a partial fix.

I've half a mind to take a job there, fix it, and quit.

[jakehilborn]

Try using displayplacer. It supports hz and I added color_depth to it a while back. I don't remember HDR being in the APIs used either but that may address it.

https://github.com/jakehilborn/displayplacer

[skunkworker]

I'm running 3 external monitors off of a laptop and for me macOS is much more consistent about putting the windows in the right place, I don't even have to plug them in the same order. When I try to do the same on my desktop with nvidia surround, all of the monitors need to be plugged in on boot in order for it to "remember" the configuration.