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There are some issues with certain Mac models which freeze when attempting to read the current brightness of the external display. Unfortunately, there is not much that can be done to remedy the situation. Most displays do, but there are some issues with Samsung displays (and possibly others), which do not implement the standard correctly. For the app to work, your display needs to support the DDC/CI standard properly. CompatibilityĮxternal­Display­Brightness uses the DDC/CI standard commands to control the brightness of external displays. This behavior is also customizable in the app's preferences. There is also an option to control the brightness of all connected displays simultaneously, by default triggered by using the keyboard shortcut in combination with the Command modifier. When pressing the keyboard shortcut in combination with Option + Shift, the brightness changes in smaller increments, just like on a real Mac. You can customize the keyboard shortcuts for the brightness actions to any of the F1 - F20 keys or the brightness keys on the Magic Keyboard (listed as MK_BDN and MK_BUP in the preferences).īy default the application takes over the default brightness keys on a Mac keyboard, which are mapped to F14 and F15, respectively. To completely quit the app, use the Quit button in the window. the app keeps listening for keyboard shortcuts when you close the preferences window. to access the preferences, simply launch the app again using Launchpad or any other method, and the preferences window will open.

The app runs as a hidden agent app, silently listening for keyboard shortcuts. Grant the permission and relaunch the app for the change to take effect. Usageĭuring the first launch, the app will request permission to use accessibility services on your Mac to listen for keyboard shortcuts. To install, download the latest release, open it and drag External­Display­Brightness­.app to your Applications folder. InstallationĮxternal­Display­Brightness supports macOS 10.13 High Sierra and newer. I wanted to make something simple which would Just Work™ and you could forget it's even there. There are a bunch of similar projects available, but they feel hard to use and are cluttered with too many options. This is a small summer project which I did to get some practice with developing Mac apps. GitHub repo DownloadĮxternal­Display­Brightness is a small utility which allows you to change the brightness of external displays connected to your Mac using keyboard shortcuts, just as you would change the brightness of the built-in display on a Macbook. ExternalDisplayBrightness | František Nesveda František Nesveda Projects About Contact ExternalDisplayBrightnessĪ Mac app to control the brightness of external displays using keyboard shortcuts.