Modify Brightness For All Displays On macOS: Any type of Mac or a MacBook can be used with an external or additional monitor. You don’t need to use an Apple manufactured display but those will work well. If you have a non-Apple manufactured display, you will then find that it works, just not as an internal display. While using it as a secondary display, some features will work. Our key point is brightness.
Brightness is a setting that users modify on their displays. Some adjust the brightness according to the time of day or night or the amount of light in the room. There are some dedicated keys available on the Apple keyboard for controlling brightness levels. But they can’t work on external displays. Here in this article, you’ll learn how you can control the brightness of external monitors on macOS. Also, you’ll get the dedicated brightness keys on an Apple keyboard to together modify the brightness for all connected displays.
Brightness for Displays
To control the brightness of an external monitor simply follow the steps carefully:
At first, install a free app called MonitorControl.
Once you install it, simply move it to the Applications folder.
Note: This app works with the brightness keys on your Apple keyboard but to do so, you want special accessibility permission.
Then grant permission.
Once the permission granted from the System Preferences, it will execute in the menu bar
You can tap the app’s menu bar icon and then use the slider to modify the brightness for the external monitor.
Remember the external display is the active one and then clicks the brightness keys to enhance or lower the brightness.
If you want to modify brightness for other displays, just tap the display so that it’s the active one and use the simple brightness keys.
You will then view the macOS display control on the screen.
Right now, in its default state, the app can’t enable you to modify the brightness for all displays at once. Rather than, you have to manually switch over to the display you like to modify the brightness for. To resolve this, head over to the app’s preferences and move to the Display tab. Turn on the ‘Change Brightness/Volume for all screens’ choice. Once you next click the brightness keys on your keyboard, the brightness will then modify for all your displays at the same time. Make sure that a Mac’s internal display’s brightness can be set to 0 where it seems as though the screen is off. Normally, It doesn’t happen with other displays so be careful how low you set the brightness.
MonitorControl is not just for brightness. If your monitor has designed audio output and the port that it’s connected to enables macOS to share audio to it. Then use the volume keys on the keyboard to control the volume for both the internal speakers or the monitor’s own speakers.
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