White screen with EGPU only connected

10.15.4 has fixed the white screen but now causes a much worse problem. If I reboot with the screen on no matter what I do the screen remains black. I unplug, replug, turn off screen, turn off eGPU... nothing will bring back the logon screen. I have to hold the power until the Mac Mini turns off then reboot with the screen off. If I shut down normally and then turn on the computer it boots fine now.

I'm fed up with this. All of these issues started after I upgraded to Catalina. Parallels randomly crashes and I worked with them for a week with no luck. It just doesn't work anymore. I has to get VMWare Fusion and now that seems to work fine. I haven't upgraded my laptop and I probably wont after all these issues. I'm going to send my Mac Mini for servicing until they either replace it or the fix it.

Mine wasn’t, it worked rally well until the Catalina upgrade running the Mac mini into a RX580 then display port into a 4K monitor. Now I can’t and have to keep changing ports around which is stupid and sloppy software design.

I just got the AMD 5700XT card and put it in my sonnet box, I have issues with installs, so I just use the build in port for updates to the OS, but for start up, it just boots like normal. I wonder it is a sonnet box issues or just the cards. I know the 5700XT has to have cata OS to work.

Nope. They couldn't replicate the issue. Recommended reinstalling from scratch or moving back to Mojave. I'm willing to bet they are starting to get more calls about this though. It may change.

looking like the new macOS beta notes addresses this issues, I will install and then report.

Guess we're waiting for 13.2 now. I'm going to start an Apple Care ticket I guess.

Well 10.15.1 is officially out, any changes to the white screen of death? or no?

Mac Mini 2018 on Catalina 10.15.1 with Gigabyte RX580 Gaming Box, same issue of white screen and instead of 5s we need to unplug it a bit longer...

As there still is no solution in sight I switched to an RX5700 card and now everything works fine under 10.15.1.

I think this problem won’t be fixed that quick.

Anything new with 10.15.2 Beta 1?

I don't think it is a hardware issue. I have problems with my setup under macOS, but no problems booting into Windows 10 via Bootcamp. Same hardware, zero problems.

Yes that has been the walk around this whole time. However, what is shocking that we are this far into the new OS and still have this issue. The firmware on the Macmini is to blame at this point.

Has anyone tried this under 10.15.3 (just released)?

I am installing the new beta today .4 and see if it finally finally fixes this.

Some of us are not on the Beta Program. Reason being that we only have one Mac system and can not afford to risk a Beta version with our only machine. We all trust Apple to provide us with a stable Mac OS update when they say it is ready for prime time - unfortunately, something slipped thru the cracks with Catalina.

That being said, I would be interested in hearing from someone who is on the Beta program if a Beta release squashed the bug!