Jul 12, 2017 — To do so, click the Apple menu and select “System Preferences.†Click the “​Displays†icon in the System Preferences window and adjust the “ .... ExternalDisplayBrightness is a small open source utility which allows you to change the brightness of external displays connected to your Mac using keyboard .... Apr 2, 2021 — You can use the brightness keys (F1 and F2) on your Mac keyboard. · You can go to Apple menu > System
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