Red Light for Mac

Features

• Native. A Control Center panel in your menu bar.
• Gradual. Blue fades out over 30 minutes after sunset and comes back at sunrise.
• Room-aware. Remembers your red and keyboard backlight for dark, dim, and lit rooms, and follows the lamps.
• Presets. Dusk, Night, Movie, and Deep night set the display, keyboard, and screen shade at once.
• Adaptive. Settings you choose on 3 of 14 nights become your defaults.
• True color. Figma, Sketch, and Photoshop get accurate color while they're in front.
• Dimmer keys. Extra Dim 1 to 4: four keyboard backlight levels below macOS's minimum.

Evening screen light cuts melatonin by 55% and delays your body clock by 1.5 hours (Chang et al., PNAS, 2015). Red Light isn't a medical device.

Install Red Light

Red Light requires a Mac with Apple silicon and macOS 26 or later.

1. Download Red-Light.dmg, and then drag Red Light to Applications.
2. Open Red Light. The first time, macOS blocks the app because it isn't notarized. In System Settings > Privacy & Security, click Open Anyway.

Red Light sets itself up and updates itself. To uninstall it, see Uninstall Red Light.

Build from source

git clone https://github.com/ervinyoung/Red-Light-for-mac && cd Red-Light-for-mac && ./install.sh

For the command line, how Red Shift works, and the files Red Light stores, see the reference.