Does macOS Big Sur update your Macs firmware?

[Keblar]

I was wondering this since my Mac was functioning without problems. Then I installed Big Sur in a different partition and now my eGPU crashes in Windows 10 and macOS Catalina! Before Big Sur, everything worked excellent!

I resorted to erase my drive, install a fresh copy of Catalina via recovery mode and also a new copy of Windows 10...but the problem persists!

Using a Sonnet Breakaway Box 350 with a MSI Radeon RX 480 hooked via HDMI 2.0 and Thunderbolt 3 to my 2018 Mac mini. Any suggestions? Please iam desperate!

Ps: One of the reasons I ask if the firmware gets updated is because after erasing my drive and installing Catalina all over again, I still get the Mac chime. My Mac came without the chime from the factory.

 

[matram]

Yes it does. To my knowledge there is no simple way to downgrade the firmware.

 

[projectle]

Yes, there is an update. No, it’s not easy to revert, but is doable with a little patience.

How to Restore BridgeOS on a T2 Mac + Boot a Mac to DFU Mode

macOS Update brick your Mac? This article will show you how boot to DFU Mode and restore BridgeOS on a T2 MacBook Pro, Air, iMac Pro, Mac Mini & Mac Pro!

mrmacintosh.com

 

[Keblar]

Yes, there is an update. No, it’s not easy to revert, but is doable with a little patience.

How to Restore BridgeOS on a T2 Mac + Boot a Mac to DFU Mode

macOS Update brick your Mac? This article will show you how boot to DFU Mode and restore BridgeOS on a T2 MacBook Pro, Air, iMac Pro, Mac Mini & Mac Pro!

mrmacintosh.com

Thanks so much for your reply and info. Unfortunately I just can’t afford of bricking my Mac Mini by following the procedure you mention in the link. I know it might be easy to some, but I don’t have the guts to try it out, after all, the computer runs fine without the eGPU connected. My question is: do you think Apple will fix this eGPU bug when Big Sur is released in September, early October?

is this eGPU error product of the Big Sur Public Beta Install? If I play a game or edit video in Mac OS with the eGPU connected the Mac freezes and goes to black screen then it reboots. In Windows 10 it throws a BSOD with memory management error or some other problem.

Thanks for your help!

 

[TrevorR90]

Damn, good thing I checked this subforum before attempting the public beta update. Don't want me firmware to be updated and my bootcamp partition to not work!