Did Big Sur (Beta 8?) kill eGPU on Bootcamp? I cannot get rid of code 12 anymore 🙁
So I had my bootcamp up and running for a week or so now with my external AMD RX 5700 XT card on my 16" 2019 5500M 8G laptop in my Mantiz Saturn Pro II eGPU enclosure. It was wonderful. I made a backup with winclone 8 just to preserve my settings even.
I upgraded to Big Sur and noticed the public beta installs v6 and then upgraded to 8 the next morning. If memory serves, I did boot into bootcamp for a little gaming after installing Big Sur beta 6 but things are hazy now. I could swear I did and it worked fine. But the next day I installed beta 8 and since then I cannot get the code 12 to go away.
Since I have a dGPU iGPU and eGPU I use the modified efi boot file using the clover configurator method. My windows bootscreen shows all three devices and I have done the DDU reinstall bootcampdrivers dance. I have tried hotplugging, port dancing, praying, etc...
I restored from my working winclone 8 image and even that didn't work!
So, I completely erased windows and installed a fresh install of windows 10 2004 from the same ISO as last week. STILL can't get rid of code 12. I reset my SMC and NVRam too since I was getting some weird security kernal fault bsod after trying to reinstall windows from scratch. Resetting SMC and NVRam cleared up that BSOD and bootcamp assistant allowed me to do a normal fresh install of windows now.
I had none of these problems prior to beta 8 of big sur... I'm not sure what to do next, but I'm hoping some good samaritan here will post that magic answer.
Anyone? I completely erased my SSD and installed the latest Catalina 15.7 from internet recovery. Reinstalled bootcamp first thing - followed the normal method - still get error code 12 - not enough resources. Did Big Sur perm change something in the firmware?
Sorry to hear the trouble. What a pain.
Mac OS updates do include changes to firmware, unfortunately.
Not sure there is a magic solution, ATM. As eGPU users, we are sometimes left waiting on the next updates to restore former functionality.
Big Sur (Developer) Beta 9 was released and updated the Boot-ROM-Version to 15126.96.36.199.0 (iBridge: 18.16.12390.5.1,0) from 15188.8.131.52.0 (iBridge: 18.16.12380.5.1,0) - maybe you can try again. I won't make it before Sunday.
@chefkoch, Figures... I spent all day redoing my macOS multiple times and bootcamp with different versions. 1903 v1 without the pci.sys move around but instead locking windows updates off seems to be satisfactory for my needs at this time - and for some reason works without any modifications really. It does hang on startup once in a while, but I booted into windows about a dozen times, and probably 8 out of those 12 times it succeeded to boot directly into windows without having to hot/cold plug or dance ports at all. If I do any VR it'll be with my Quest or upcoming Quest 2... So screw WMR and the 2004 branch of windows
And for what it's worth - I'm running Big Sur beta 6 from a usb install and started from scratch... In my software updates it still says beta 8 is available - do I need to update to 8 in order to get 9? Are they incremental and not cumulative?
I'm pretty happy with how things are at the moment... and I more than appreciate everyone's help in figuring things out.
@erik_tank and @pfk84, Give Hackflags 0x600 a try. It helps resolving error 12 for my 2018 Mac mini + RX Vega 56 Nano + Gigabyte Gaming Box (running latest macOS 11 Big Sur Beta and Win10 2004 Preview).
@itsage, any pics of that build? I cant remember... (off to search). Still working on my Mini eGPU build, its been a slow burner...
edit: @erik_tank no issues here with the latest Beta (9) and my set up - 2017 MBP, EFI Bootloader and RX580. It never ceases to amaze me when an eGPU is up and running perfectly and how it turns an Ultrabook (MacBook Pro 13inch) into something that can game pretty solidly (PC types may claim anything sub 140fps is unplayable, but whatevs). My only issue these days is my dual core CPU doesn't really cut it...
2017 13" MacBook Pro Touch Bar
GTX1060 + AKiTiO Thunder3 + Win10
GTX1070 + Sonnet Breakaway Box + Win10
GTX1070 + Razer Core V1 + Win10
Vega 56 + Razer Core V1 + macOS + Win10
Vega 56 + Mantiz Venus + macOS + W10