Instead the value is passed through an algorithm that is constantly adapting to your manual adjustments so that the perceived luminosity stays the same across all monitors. When Lunar detects a brightness change, it doesn't send the brightness value of the internal display as it is.
You can also adjust external monitors separately using Ctrl+Brightness Up/Down. To use a monitor as a source, click on the Sync Target button on the display page to toggle it to Sync Source.īecause Lunar is constantly listening for brightness changes, you may keep adjusting your source display using the brightness keys, TouchBar sliders or Control Center from the menu bar, and your external monitors will get those adjustments as well. Lunar can take advantage of that by observing the brightness of these displays and sending every change to the external monitors. If you have 'Automatically adjust brightness' enabled in System Preferences, macOS will always adapt Apple displays to the ambient light around you using their internal light sensor. Synchronise the brightness of your built-in display to all your external monitors.
