That is very odd! There have been some firmware updates for the Mac Pro, but if that was the issue, it would have happened when you upgraded your Mac, not a few weeks later.

as I don't know how to begin to try to solve this issue. I am now using an HDMI monitor through the HDMI port of my main Mac Pro and the computer seems to be functioning perfectly well.Īny help would be very greatly appreciated. I then thought that maybe it was the monitors but I plugged them into my old MacBook Pro laptop (running Sierra) and both monitors worked fine. Imagine my surprise when I plugged each monitor into my other Mac Pro (running Catalina) and found that all those ports didn't work either. I had upgraded to Monterey a few weeks ago and everything was working fine but I thought it could be the cause. Two days ago, all the Thunderbolt ports on my first Mac Pro stopped working. With one, I had been using two Apple Cinema Displays, both 27' Model A1316. I own two Mac Pro (Late 2013) 'trashcans'. Hello, this is my first time on this forum so I hope this is the correct place to ask this question.

Macbook pro late 2013 thunderbolt