Mac Mini 2018 + Razer Core X C + Vega 56 + BootCamp / Error 12, Stuck on Ready, ...
 
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Mac Mini 2018 + Razer Core X C + Vega 56 + BootCamp / Error 12, Stuck on Ready, Install Issues  

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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

@melonking, Windows 10 1903 V1 (18362.30 to .295) is still the best version to use for Mac users. AMD and Microsoft have been working on a fix for about three months now. Using the right version of Windows in Boot Camp makes a world of difference.

I'm using the modified apple_set_os.efi v0.5 EFI boot loader by @aa15032261 to keep an RX Vega 56 eGPU connected at boot. It has been working great with my 2018 Mac mini.

 

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2019 13" MacBook Pro [8th,4C,U] + RX 5600 XT @ 32Gbps-TB3 (VisionTek mini eGFX) + macOS 11 & Win10 2004 [build link]  


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Melonking
(@melonking)
Active Member
Joined: 8 months ago
 

@itsage, As I said above, I still don't feel that using old windows builds is a real solution. A solution is about actually fixing the problem now and forever, not using old versions, Iv aimed this topic to be a logbook of my attempts to do that. Both for the benefit of other Mac Mini users, and any devs from MS/Apple out there who might be watching.

That said, I have tested 1903 and was unable to install it. After 3 attempted installs, In all occasions the screen remained black after bootcamps first attempt to boot into windows for install and required a force restart. This could be down to using a usb-c to displayport cable over hdmi but as my screen is displayport only, I have no other option.

So while I disagree with the use of old builds, it also appears its physically not possible for them to be used on my system as well.

 

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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Johnnodrums
(@johnnodrums)
New Member
Joined: 4 months ago
 

Thanks @federian for posting the process below. It worked for me!!

I did this with:
2018 Mac Mini 3.2 GHz 6-Core Intel Core i7 MacOS 10.15.4
Razer Core X Chroma Thunderbolt 3 enclosure
AMD Radeon RX Vega 56

I got my windows file from here https://tb.rg-adguard.net/public.php  Have no idea how trustworthy the ISO files are but I found the exact build you mentioned 18362.30, and followed the rest of the steps you list. Works perfectly. Also to get the 19.9.2 driver I grabbed that from here https://www.amd.com/en/support/kb/release-notes/rn-rad-win-19-9-2  because they keep updating.

Posted by: @federian

I have a similar setup (except that I have a RX 5700). It's not complicated to get it to work (no need for DDU nor boot loaders nor any of that) but it is essential to have the right version of Windows 10, i.e. 1903 Build 18362.295 (any newer version will leave you with an unfixable error 12). There is also no need to mess with Virtual Machines, if you don't have HDMI in your monitor, you can just get a USB-C to DisplayPort cable.

Anyway, here's what to do:

1) Install Windows 10 1903 v1 in BootCamp (you'll have to find this ISO somewhere in the internet, it contains Build 18362.30)

2) Boot in Windows using with a USB-C to DP cable. Update to Build 18362.295 ( https://www.catalog.update.microsoft.com/Search.aspx?q=KB4512508 )

3) Hot plug the eGPU (you may need to try 2 or 3 times with different ports). Once the eGPU is recognized by Windows you'll get an error 12, but you can now install AMD drivers. Go with version 19.9.2, as the newest version, 19.12, has shown problematic for eGPUs.

4) Turn off the computer, connect your monitor to the eGPU and boot up. That should do it. Turn off Windows updates.

 

PD: Some users have commented on issues with Catalina 10.15.2. I've stayed with 10.15.1 so I can't comment on that, but you might want to downgrade.

 

 

2018 Mac Mini 3.2 GHz 6-Core Intel Core i7 MacOS 10.15.4
Razer Core X Chroma Thunderbolt 3 enclosure
AMD Radeon RX Vega 56


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SicTransit
(@sictransit)
New Member
Joined: 4 months ago
 

This worked for me for about a week with turned off Windows Updater. Two days I installed the latest 600MB BootCamp update and it doesn't boot anymore, changing between Windows boot logo and black screen with green stripe on the left. Thanks a bunch, Apple.

 

Posted by: @johnnodrums

Thanks @federian for posting the process below. It worked for me!!

I did this with:
2018 Mac Mini 3.2 GHz 6-Core Intel Core i7 MacOS 10.15.4
Razer Core X Chroma Thunderbolt 3 enclosure
AMD Radeon RX Vega 56

I got my windows file from here https://tb.rg-adguard.net/public.php  Have no idea how trustworthy the ISO files are but I found the exact build you mentioned 18362.30, and followed the rest of the steps you list. Works perfectly. Also to get the 19.9.2 driver I grabbed that from here https://www.amd.com/en/support/kb/release-notes/rn-rad-win-19-9-2  because they keep updating.

mac mini 2019 / Radeon Vega 56 / Razer Core V2


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Ki A
 Ki A
(@ki_a)
Active Member
Joined: 5 months ago
 
Posted by: @federian

I have a similar setup (except that I have a RX 5700). It's not complicated to get it to work (no need for DDU nor boot loaders nor any of that) but it is essential to have the right version of Windows 10, i.e. 1903 Build 18362.295 (any newer version will leave you with an unfixable error 12). There is also no need to mess with Virtual Machines, if you don't have HDMI in your monitor, you can just get a USB-C to DisplayPort cable.

Anyway, here's what to do:

1) Install Windows 10 1903 v1 in BootCamp (you'll have to find this ISO somewhere in the internet, it contains Build 18362.30)

2) Boot in Windows using with a USB-C to DP cable. Update to Build 18362.295 ( https://www.catalog.update.microsoft.com/Search.aspx?q=KB4512508 )

3) Hot plug the eGPU (you may need to try 2 or 3 times with different ports). Once the eGPU is recognized by Windows you'll get an error 12, but you can now install AMD drivers. Go with version 19.9.2, as the newest version, 19.12, has shown problematic for eGPUs.

4) Turn off the computer, connect your monitor to the eGPU and boot up. That should do it. Turn off Windows updates.

 

PD: Some users have commented on issues with Catalina 10.15.2. I've stayed with 10.15.1 so I can't comment on that, but you might want to downgrade.

I can confirm this worked for me, thank you @federian!!!. My setup is below, but I have a weird dilemma now and there is no longer any sign of a apple bootcamp updater, control panel, etc. Also, Bluetooth is missing. These are small things as I can easily work around them for how I use Win 10. I cant figure out how to boot back into Mac OS now though. I've tried holding Option at many different points in the restart process, and the keyboard is connect via USB. Any advice/suggestions is greatly needed and appreciated! Thanks. 

 

My Setup:

LG 27" 5k Ultrafine (Gen 2)

Razer Core X w/ AMD 5700XT

Mac Mini (18/20) - 6 core i7

This post was modified 1 month ago

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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keyosc
(@keyosc)
Active Member
Joined: 3 weeks ago
 

I can also report a success story by following @federian's instructions to the letter.

My setup:

I am connecting the monitor to the Razer Core X Chroma by means of a DisplayPort cable, and the eGPU is connected to the Thunderbolt 3 port closest to the HDMI port. I have two USB-A devices directly plugged into the Mac mini: A Logitech unifying receiver (for my MX Master 3 mouse) and a USB-A to USB-C cable connecting my mechanical keyboard. (For the setup, I used Apple's Wireless Keyboard (the tenkeyless one) plugged into a USB-to-Lightning cable until I was comfortable enough to swap this out. The mechanical keyboard I use doesn't let me hold Option to select the OS, but I didn't have to use this.)

My only issues have been minor:

  • Windows 10 functioned perfectly fine until my first restart. Now it seems to think I'm using multiple monitors. It's quite unusual: My actual screen is Display 2 and defaults to 60Hz, whereas the "phantom" Display 1 shows up in the advanced display settings menu as the exact same model and resolution (AW3420DW at 3440x1440), but with a 1Hz refresh rate. Poking around in that menu gave me a blue screen one time so far.
  • Upon booting into macOS using the Boot Camp option in the system tray, I get a quick kernel panic each time. The Apple logo shows up as normal, and then I hear the Mac mini's fans go wild for a half-second, then it restarts again.

Other than those two oddities, things seem to be functioning quite well! 120Hz in Rocket League in Windows 10, 120Hz in macOS... I'll report with any updates or other weird things that happen, but I'm pretty okay with this so far.

2020 Mac mini (6-core i7, 64 GB RAM, 2 TB SSD) + Razer Core X Chroma + RX 5700 XT (Gigabyte Gaming OC 8G)


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