The Manual Mode, if selected, disables the adaptive algorithm and allows you to control your monitor by using the Lunar UI or custom hotkeys.If you choose it, the brightness of your monitor will adjust to the time of the day. The Location Mode automatizes the process.If you’re an advanced user, you can configure the curve algorithm yourself. The Sync Mode lets you synchronize the built-in display preferences to the external monitor.If it supports it, you can install the Lunar app and start regulating brightness and other preferences of your monitor straight from your MacBook.Īfter you’ve to downloaded and installed Lunar, choose one of its modes: The only requirement is that your external device supports the Data Display Channel (DDC) protocol. Lunar is a free app for Mac, designed to synchronize the settings on all your displays. If you’d like to avoid tapping buttons on your monitor, you can control your preferences with Lunar. You can use ExternalDisplayBrightness to control only one external display.Ĭontrol the Brightness on Your External Display with the Lunar App Also, if you use multiple monitors, you may wish to try another solution. Some external monitors have preferences that prevent the changes you made from having an effect. Once you’ve configured ExternalDisplayBrightness, use the keys that you selected to change the brightness on your external screen. Don’t click Quit just close the window.Set one key for increasing and another for reducing the brightness. Set the preferences by choosing the keys which you’d like to use to regulate brightness for your monitor.You’ll need to grant them if you want the app to serve you properly. During the installation, you’ll be asked for special accessibility access.Download the app from the app store and hit install.Use ExternalDisplayBrightness to Control Your Monitor’s BrightnessĮxternalDisplayBrightness is a popular app that allows you to manage the brightness of your external device. Apart from using the keys on your monitor, here’s what you can do to control the brightness on all of your displays. While you normally can’t use the brightness keys or system preferences to control the behavior of external hardware, some apps make it possible to do so.

But if you’re using an external monitor, things are a bit more complicated.

It’s easy to control brightness and contrast on your MacBook display.

Instal the new LunarLux