Download Gamma Dimmer (Mac) – Download & Review Free

One of the downsides of using third-party monitors is not being able to control your screen’s brightness using the keys on your Apple keyboard designed for this purpose. It is much more convenient than reaching for your monitor’s controls, but it is not supported by third-party displays.

Gamma Dimmer is an attempt to make this function available on any monitor connected to your Mac. It is designed as an alternative to Lunar for users who only need to alter brightness and perhaps don’t have a monitor that supports DDC.

Simple and effective brightness adjustment

Once the app is up and running, you can use the F1 and F2 keys to lower and increase your screen’s brightness, just like on an Apple display. Alternatively, you can access the app from the menu bar and check or alter brightness using your mouse.

The app works by modifying the gamma tables of each connected screen, as opposed to applying an overlay, which is what most similar apps do. However, if your monitor does not support gamma adjustment, an overlay mode is also available.

Supports multiple monitors

If you have more than one display connected to your Mac, you can control all of them individually or keep them in sync. By default, the F1 and F2 keys will only affect the active screen, but you can hold down Shift to control all displays at once.

Since different monitors can be brighter or dimmer at the same brightness level, you should first adjust them all individually until they match. Then, when altering their gamma while holding down Shift, their particular settings will be preserved so they all remain in sync.

Awesome app for third-party monitors

If your monitor isn’t made by Apple, it’s likely that you very rarely change its brightness, simply because it’s so cumbersome to do so. Gamma Dimmer brings the same convenience you get from a laptop or Apple display to any external monitor, and it should work with pretty much any device out there.