2018 MacMini Update from MacOS Catalina 10.15.2 -> 10.15.3 — Broke Bootcamp, Help Appreciated
Apologies if this is tracked elsewhere on the site. I've been able to dual boot from MacOS Catalina to Windows (.239) using an AMD 5700xt and a Razer Core X. This has been working well for months.
Like a fool, I ran the .3 MacOS Update, and have since been unable to get the radeon to work in the windows environment (I also, like a fool, have no time machine backup to just roll the system back to what works...and I don't really want to blow the whole thing up and start over, big software stack and all).
Here's a quick example of the use case:
- From cold boot— Radeon connected via TB3 connection closest to ethernet. Monitor is connected to DisplayPort on Radeon Card.
- Card spins up and display works, both boot options are displayed after hitting option.
- Selecting windows yields a black screen...won't boot to desktop. This was with the 19.2 drivers working previously. The only thing changed was the .3 update.
Here's what I've tried:
-Running AMD cleanup utility.
From cold boot:
- Connected to iGPU with HDMI to monitor.
- Select Windows
- Boots to windows desktop and logs in.
- Turning on eGPU SOMETIMES crashes the USBA connections so input devices don't work (but machine is still responsive).
- Sometimes, the card spins up, and the machine is fine. Card can be seen from device manager as a generic microsoft display.
- Running the driver package from device manager (manually browsing) here yields a successful AMD 5700XT detection. Dropping the HDMI connection and switching the monitor input works.
Cold boot, windows selected, black screen.
So, I can't figure out what's up with the thing.
- Windows is located on the internal SSD of the machine.
- There are a few input devices in the mix:
- -Asus monitor w/ USB hub connected to USB A on MacMini
- -External SSD connected to TB3 closest to HDMI.
It is interesting to hear that this Catalina update effects the Windows environment so seriously.
I had some challenge with the windows environment of my system as well. I found out that for a (cold) boot to Windows, I need a second connection to the monitor from the Mac Mini. In my case it is HDMI to HDMI. However, during the boot, my monitor must be switched to mDP because the connection - monitor to eGPU, is mDP to DP. The screen remains black until the system loads the windows welcome screen.
BTY is your system working with Catalina after the update?
Cheers and success
Yes, after the .3 update with Catalina MacOS itself with the eGPU remains stable and performance is great. It's just not handling the boot into windows with the eGPU well. Windows itself though, runs fine sans eGPU.
My monitor has a variety of connections as well...DP, mDP, and HDMI. My eGPU is running off the DP connection.
Yay technology! Maybe the great and powerful @itsage will have some insight.
I agree that a specialist should have a look on your case.
I checked the difference between macOS 10.15.2 and 10.15.3 and with my limited understanding, I see no direct conjunction to bootcamp / windows. However, may be there is one.
Anyway: Cheers and success
I boot into Windows from Catalina 15.3 all the time.
No issues using a 2018 Mini and a RX5700 XT.
I simply select “bootcamp” as the startup disk from within Catalina system preferences. Then re-start.
Works perfectly every time.
I have the AMD driver included in AMD’s Adrenaline software package from November 2019.
I’m running Windows 10 Pro 1809.