USB-C ports broken after 11.2 update

I have had a similar problem, but not the same.

Display not working properly after 11.2 update.

Plugged in to USB-C port, to VGA adaptor.

Description here:

https://discussions.apple.com/thread/252402194

Al.

Ah, I see, ignore that. But why isn’t your monitor on HDMI? I’m speculating that’ll fix it. Unless you’re after some special resolution (which 11.2 might have fixed), HDMI IMO is also better. Give it a shot?

This doesn't work. The update to 11.2 has completely disabled the usb-c ports on 16gb m1 minis, you can't access DFU mode at all bc there's no connection from the thunderbolt ports.....I cannot actually believe that Apple let this firmware update slip through like this...unacceptable.

Seems like there's firmware update with macOS11.2 that somehow bricked the USB C ports because even rollback the issue still there. I told the genius I returned so that you guys can have closer look at it and resolved it therefore it can help others.

Thanks.

“I have just had my two USB-C/Thunderbolt ports on my brand new M1 Mac mini fail when they were working fine earlier today. I have Big Sur 11.1 OS. It seemed to fail after I plugged in a USB-C multiport adapter.” - earlier today.

But worth a shot, although my understanding is the firmware, which was packaged with 11.2, isn’t (user) downgrade-able.

Not yet a problem to fix in OS/firmware. We know it was pre-existing on 11.1 and there’s a hint that connecting it to unsupported hubs may have triggered it although the poster has yet to post details. Add to it the reluctance to seek warranty repair (which could be denied if the machine shows signs of fiddling with it), and the fact that MacBooks with the same chip and logically same firmware are unaffected, this whole 11.2 story is sounding more like...well, a story.

The problem is, a dead port doesn’t tell stories of when it died, at not until until Apple have their hands on it, which the 11.2 theorists don’t wanna do (for reasons known only to them). Others meanwhile, have new logic boards on the way or full refunds in their pockets. Smart! The very few rest should do likewise.

After powering right down and trying a diagnostic test, I plugged my other dock into the USB-C port and the dock works fine, but my monitor still won’t work through the USB-C port. HDMI does work for the monitor though.

Disable sleep, it's a non-feature for the 2018 mini.

I called about my Mac Mini M1 and they do not have a fix, but at least they did register the issue with engineering. That's going to be the only way to get it fixed quickly.

This sounds like breaking news in more ways than one...

Say it ain’t so? Because if it is, Apple has a **** mess on their hands. Thankfully nothing changed on the Intels (nothing needed fixin’ for me and nuthin’ broke, whew).

I noticed my 2018 Mac mini has a minor display issue coming out of sleep after update. The monitor wakes but then briefly goes black again and then wakes again. I use a USB C to DisplayPort adaptor for my monitor. This was not happening prior to Catalina update.