RedScreen: Advanced screen dimming for Mac OS X

RedScreen icon

RedScreen (free software)

RedScreen is a useful and free utility for night vision.

It serves just one purpose: to preserve your dark adapted eyes, so you can work with your mac in a dark environment.

It does this in two ways:

1. It makes your screen red. Red affects your night vision less than other colours.

2. It can darken the screen. It does this by reducing the backlight, and also darkening the colours on screen. It can go VERY dark.

RedScreen controls the video hardware directly, so it works with all applications and it restores the system to your original settings as soon as you close the program.

It’s very simple to use. Press the ‘Activate’ button to make your screen red. Control brightness with the ‘Backlight’ and ‘Dimming’ controls. You can turn off the red filter if you just want your screen darker.

There’s a few settings to disable or replace the standard OSX screensaver (if the normal screensaver activates it can briefly disable RedScreen), and an option for greyscale (this can also improve display quality with the red filter active).

Click here to download RedScreen.

RedScreen is totally free to use, but please contact us if you want to distribute it.

Mavericks support

Unfortunately RedScreen does not work with Mavericks (OS X 10.9) at this time.

If you are interested in helping to fix this issue, or to help improve RedScreen, it’s Open Source Software – the source code is available on GitHub here: https://github.com/psonice/RedScreen


RedScreen is produced in my own time, and offered as a totally free application. However if you find it useful and would like to contribute towards future development, donations are very much appreciated!




There’s no minimum amount, and it’s secure (through PayPal).
PayPal accept credit/debit cards, you don’t need an account.