How to Adjust Brightness on Mac Thunderbolt Display?

How to Adjust the Brightness of a Thunderbolt Display in OS X ...

To change the brightness of your Thunderbolt/LED Cinema Display , press CTRL and F1/F2. Note that you must have the USB cable plugged into your laptop for this to work properly. ‎With Display Brightness you can adjust brightness of your multiple screens from a convenient menu bar app!

How do I Adjust the Brightness on my External Monitor Mac?

Choose Apple  > System Preferences , and then click Displays.
Click the Display tab.
Choose a resolution or color setting, or drag the Brightness slider to adjust the brightness.

How do I Control the Brightness of my External Monitor?

To change the brightness on an external monitor , use the buttons on it. The Brightness slider appears in action center in Windows 10, version 1903. To find the brightness slider in earlier versions of Windows 10, select Settings > System > Display, and then move the Change brightness slider to adjust the brightness.

How do I Change the Brightness on my Mac LED Cinema Display?

The Cinema Display has no buttons. To adjust brightness , you can use the buttons on your Apple keyboard or open the Displays System Preferences pane and move a slider there. You can also turn on or off the ambient light adjustment through Displays Preferences.

Why Won't My Mac Let me Change the Brightness?

You can go to Apple menu > System Preferences, click Displays, then click Display. And then turn on “Automatically adjust brightness”. You can also drag the Brightness slider to change the brightness manually.