Cannot install macOS Monterey 12.1 on MSI B550 edge wifi motherboard

tjthelion

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Jul 30, 2020
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When I attempt to boot into the installer I get still waiting for root device and NVME assert failed with the prohibited sign on 12.1 beta 3. I cannot boot into macOS no matter what EFI I create or use: all of them fail with the exact same error. According to other threads the only other option is to downgrade my motherboard BIOS but I'm using a 5600x and I also need Monterey 12.1 since I'm using a 6600 XT. Has anyone found a solution?
Here are the EFI's I've attempted to use:

Here are my specs:
CPU: 5600X
Motherboard: MSI MPG B550 Edge Wifi
GPU: MSI 6600 XT
 

Aluveitie

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I think "NVME assert failed" is a sign of the MSI BIOS issues. So with a Zen 3 you're basically locked to Big Sur for now.
So you could switch to a Zen 2 and downgrade the BIOS to a working one, or replace your motherboard with a non-MSI one.
 

ImpossibleObject

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Jun 20, 2021
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I think "NVME assert failed" is a sign of the MSI BIOS issues. So with a Zen 3 you're basically locked to Big Sur for now.
So you could switch to a Zen 2 and downgrade the BIOS to a working one, or replace your motherboard with a non-MSI one.
Is there a specific release date from which bioses will still work? Running Zen2 on MSI B450 and kinda worried that it might not work since I already had trouble with the last install
 

cgla

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May 24, 2021
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Hi I have similar request due to my RX6600XT GPU. I need 12.1 but my MSI MB is holding me. I can install 12.0.1 but no GPU support..

Have you made any progress recently?

Thanks Pal!
 

eg_julien

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Jul 31, 2021
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Hi,
Same problems here with an MSI B550 A-pro... I newly bought an 6600XT since my previous gc died.

Did you find some new stuffs ?

I actually wanted to downgrade my Bios version but I can't find any download ... do you know where I could find that ?

Thanks !
 

Shaneee

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AndryX19

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Sep 28, 2021
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When I attempt to boot into the installer I get still waiting for root device and NVME assert failed with the prohibited sign on 12.1 beta 3. I cannot boot into macOS no matter what EFI I create or use: all of them fail with the exact same error. According to other threads the only other option is to downgrade my motherboard BIOS but I'm using a 5600x and I also need Monterey 12.1 since I'm using a 6600 XT. Has anyone found a solution?
Here are the EFI's I've attempted to use:

Here are my specs:
CPU: 5600X
Motherboard: MSI MPG B550 Edge Wifi
GPU: MSI 6600 XT
Same error on mine msi B550i, the problem seem connected to cpu version, i mean with ryzen 3xxx no problem at all, only with 5xxx there's a problem. Hope someone can fix it.
 

p2mmao

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Jul 2, 2021
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12.4 runs on my MSI B550 Mortar wifi with 5800x and samsug M.2 PM9a1 SSD, and succesfully upgraded to 13beta, some guys use samsung T7 USB HDD to successfully install 12.4 on MSI B550 Mortar wifi with 5600, you can also try SATA SSD on MSI B550 Mortar wifi
 

AndryX19

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Sep 28, 2021
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12.4 runs on my MSI B550 Mortar wifi with 5800x and samsug M.2 PM9a1 SSD, and succesfully upgraded to 13beta, some guys use samsung T7 USB HDD to successfully install 12.4 on MSI B550 Mortar wifi with 5600, you can also try SATA SSD on MSI B550 Mortar wifi
Can I ask you to share your EFI (remove serial and mb no.) to check difference with mine and also the bios version running on your motherboard?
 

yosbel12

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Jun 22, 2022
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12.4 runs on my MSI B550 Mortar wifi with 5800x and samsug M.2 PM9a1 SSD, and succesfully upgraded to 13beta, some guys use samsung T7 USB HDD to successfully install 12.4 on MSI B550 Mortar wifi with 5600, you can also try SATA SSD on MSI B550 Mortar wifi
I HAVE A MSI B550 CARBON WIFI with rayzen 7 5800x what are the ste[s to get the monterrey working i have big slur already but cant maake monterrey work
 
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