I've never before needed to adjust the brightness on my Apple Thunderbolt Display, but now I do (because it's awakened dimmer than usual) and I can't find a way to do it. (Computer is 13-inch, 2020 MacBook Pro with 4 Thunderbolt ports running Big Sur 11.6)
Hi jamboulet,
We see you're trying to adjust your display brightness settings on your Thunderbolt Display. You can find those options in your Display System Preferences. Here's a resource to guide you there: Change your Mac display's brightness
We hope this helps.
Take care.
Brightness slider was not there. But after resetting the NVRAM, and unplugging and reconnecting the monitor three times, the slider reappeared.
Brightness of Thunderbolt Display
