USB-C ports broken after 11.2 update

Have you tried resetting the SMC and NVRAM?

How to reset the SMC of your Mac - Apple Support

Reset NVRAM or PRAM on your Mac - Apple Support

If you have a Bluetooth keyboard, you may need to connect it to a USB port on the Mac.

There is yet another option if you have access to a fairly recent

second Mac.

The Configurator 2 app now has the capability to "revive" an M1 systems

firmware, i.e. re-flash. Perhaps there was just a borked firmware install

and reflashing it may fix it (system hiccup, phase of the moon, etc.).

Revive or restore a Mac with Apple silicon with Apple Configurator 2 - Apple Support

Just stick with the "revive" portion unless you really want to wipe and

start all over.

One thing that has not been mentioned, have you tried rolling back

to a point before the update from your Time Machine backup?

One way to prove if it is a hardware failure or an IS update failure.

Nonetheless, shut down, unplug from wall and restart after 10 minutes, might bring the ports back to life.

Try using a usb-a flash drive with 11.1 or 11.0.1 to downgrade. Has the same issue on my dtk Mac mini but with usb-a ports and 11.3 beta. 11.2 downgrade fixed then.

FWIW, it hasn't affected my USB-C dock on my MacBook Air

(only has TB/USB 4 ports). Normally, in this sort of situation

I would suggest downloading and installing a Combo update.

However, in their "infinite wisdom", Apple is no longer providing

combo updates for macOS Bug Sur (no a very good move).

You could try re-installing from recovery which should download

the latest macOS version or download the full version from the App Store.

Rang Apple support yesterday, had a long chat with one advisor, tried starting holding down power button, then restarting normally, obviously none of this helped.

Then escalated to another advisor, he looked at screen shots, as my VGA dispaly works, but not properly, (the monitor has a floating box saying "input not supported", but desktop shows cut off to the left, and image is scaled incorrectly, downloaded logs and all that, he just said the 11.2 update was supposed to cure previous problems people had had, but ended up causing problems for others. Obviously Apple are aware of this, and a fix is on the way... in the meantime back to my old windows 8 pro suface ;(, connected to my display via an Apple mini HDMI to VGA......

Al.

Well, sorry for not sympathizing, but taking it for Apple warranty repair is an option that’ll get you real progress, possibly even a swap with a new mini. It’s also an opportunity to have your issues independently verified hands-on by Apple, something logs and testing can’t do.

As of now, at least part of the problem description is hearsay and it’ll stay that way until Apple can take a look at your machine first-hand. So, haul it to Apple, they’ll take it from there, you’ll get much needed action. Good luck!

You’re assuming there’s a fault with 11.2 that Apple will fix - as of now there’s no official basis for that. Meanwhile, others are already well into return/repair/refund. So, for most purposes this problem, which has affected only a minuscule fraction of all users, is now history.

Separately, delaying reporting a fault for warranty repair could place the warranty at risk. Essentially, it prevents Apple from independently verifying the problem, just so you’re aware..

As for your question of law, the fault you report hasn’t been isolated or replicated, it’s limited to hearsay accounts by some users and may well have pre-existed silently before the update manifested it. So really, there’s nothing to discuss on the law aspect. You have a warranty that Apple will readily honor or polite phone calls that’ll go through the motions but yield nuthin’. The former is the only option that’s time-bound and legally tight. Easy choice, huh? I’d just do it.

Nice! So it’s not a 11.2 issue, confirmed pre-existing. Details on the USB-C adapter please? Try restoring from backup? If that doesn’t fix, do schedule warranty repair/replace, don’t wait. Good luck!

Looks like DFU might be the only way.

Interesting enough, the Mac Mini DTK lost both USB-A ports on the 11.3 Beta update!

I performed a "Erase Mac" (Different from diskutil erase hd) from recovery and reinstalled 11.2 with USB. This process did not downgrade the firmware. After that, the ports started working again ?? I'm not saying this will work on the normal M1 Mini but it's a very interesting note. I'll try to reproduce this again just to make sure it was not a fluke.

Make sure you have a 11.1 USB installer handy.

If your M1 mac is encrypted you will be prompted to login to recovery. Erase Mac is in the menu bar in the upper left. If not then start up terminal in recovery then run this command

resetpassword

this will bring up a new menu, where you can find "Erase Mac" in the upper left menu bar.

This will erase all data on your HD along with nvram settings. You will be prompted to activate your Mac after.

I am almost ready to test this again myself.

If you have a new Mini, call Apple Support. If they don't come

up with a fix they will certainly forward it to engineering as

a bug.