11.5.2 rendered USB-C ports useless

Try the following:

Having a similar issue...upgraded to 11.5.2, I had an old Apple Retina monitor attached via a Thunderbolt2 to Thunderbolt3 adapted to my 2019 iMac... now it doesn't recognize the monitor at all anymore... and the iMac has rebooted on its own a couple times because of a "problem"....

Never experienced anything like this either.

11.5.2 also ruined my Thunderbolt connection to my monitor.

I can't use the TB port which is also charging the Laptop, loosing display connection permanently.

Only the standard TB (non 60W) port is working, which does not help long....

I'm sorry to say, but Mac OS has become .... over the last years.

Standard topics like Bluetooth (Logitech stuff) or Thunderbolt connections to monitors failing. Honestly?

Not to speak about other topics, like missing HDR support for a 4K HDR monitor....

The M1 is really a nice machine, but when there is nice ARM machines for W11, who knows....

Hi all, I have a 2018 T2 chip MacBook Air, everything was working good as usual until I updated to 11.5.2, and my usb-c ports became almost unusable. First of all, I realized my battery was draining like in 30% charge with the "plug" icon and the message "the Mac is not charging", what I found quite rear because the battery was low at 30% and it should be charging. I unplugged the charger with the horrible surprise the Mac still said it was plugged but not charging! After that, the MacBook Air went out of battery, and I could only charge it with only one usb-c port, the one far away from the screen, but not always recognize the charger... and the other usb-c port, is dead, no matter what you connect, it doesn't work anymore... tried with pen drives, plugging my iPhone (not charging even)... nothing works.

This last update become my Mac almost unusable, it only has two usb-c ports and only one could barely work, so I can't work with my external drives, monitor, etc... common apple, more than 20 years working with Macs and never happened nothing like this before, it is shame such an error... Of course I did a diagnostic and it is not a hardware problem, is something really bad in this last firmware update. Please we need to solve the problem ASAP.

I'm thinking about restore with a time machine backup, but Apple did impossible to downgrade a previos Big Sur version, so...

I tried everything mentioned, reset the SMC and NVRAM several times with no luck.

Anybody is finding another solution?

Seems like the update to 11.5.2 was not the issue, but was a coincidence with a monitor hardware issue arising

The monitor seems to have a loose TB port connection, and is now sent in for repair....

In this case I was unfortunately blaming the wrong one....

Not a coincidence, at least in my case, problems appeared the very same moment after updating to 11.5.2, and is not only a matter of monitor issue, is the TB usb-c stopped working with any peripheral... I can not even charge my iPhone since the update let it dead.

Try PRAM and SMC reset. For PRAM/NVRM:

https://purplecomputing.com/tech-how-to/how-to-reset-nvram-or-pram/

Hi , same probleme but with a M1 mac mini

how to fix it ?

How to reset NVRAM on an M1 or Intel Mac

I tried the reset fix above and it did work.... for a few minutes... iMac rebooted because of a "problem" and the monitor was no longer recognized...

Thanks, but NVRAM reset doesn't help for my M1 TB Monitor connection issue.