After upgrading to macOS 26 yesterday on my Mac Studio M1 Max, my display stopped working. I am using a 65" Vizio TV as a display and when I plug that same exact HDMI cord into a computer monitor it displays correctly. Any ideas on why this is not working? Thanks!
Mac Studio, macOS 26.0
Update: I purchased a high quality USB-C to HDMI cable, and that made no difference. The TV/monitor was still missing in the Display settings and it automatically attempts to mirror the TV as an extended display. Worst yet, there is no way to stop mirroring/extending. What I wound up doing as a band-aid was installing a utility called "BetterDisplay" which has a setting to force a discovered TV to be seen as a "computer monitor". That totally fixes the forced mirroring of your TV connected via a USBC or HDMI cable. I switched back to a normal hdmi cable to free up a Thunderbolt port and all is good!
Thanks for the update. Perhaps something specific with your TV or maybe the fact that you are using multiple displays? Mine is still not working... Hoping for an update soon!
I'm glad it worked for you. But not for me.
Apple just (November 3, 2025) released macOS Tahoe 26.1. We'll see soon enough if the update fixes the problem.
Nope, not for me. Updated to 26.1, restarted, tried to mirror to my TV (running on an Apple TV box), and the share worked for about 5 seconds, then quit. Real slick work, Apple. Most impressive.
TV as display not working after macOS 26
