If Command-Tab is too slow, 

check out our new app:

rcmd app icon rcmd

Keep the colors vivid

Lunar controls the same brightness that you can change by using the monitor's physical buttons, even on M1.

Unlike other software that only simulate a brightness change by adding a black overlay over your screen, Lunar uses DDC (Display Data Channel) to send commands like set brightness to 30% or switch input to HDMI 2 directly to the monitor.

This keeps the colour rendering closer to reality, consumes less power and minimizes the backlight bleeding effect.

Apple vendored displays get special treatment as Lunar uses an implementation hidden inside macOS Display Services to control them natively. The list of displays include:

  • Pro Display XDR
  • LG Ultrafine
  • Thunderbolt Display
  • LED Cinema (when connected via USB)

Control everything from the keyboard

The same brightness and volume keys can now control all your external monitors.

Hold Control while pressing brightness keys to adjust external monitors, or Control+Option if you want to change the contrast.

If the monitor audio output is active, the volume and mute keys will control it without any setup.

When using multiple devices with the same monitor, you can switch to other inputs and adjust the brightness to a preset value with a single key press.

Keep all your displays in sync

Sync Mode

Pro Feature

Sync Mode ports the MacBook's adaptive brightness feature to all your external monitors.

Whenever macOS adapts your MacBook display using the built-in Ambient Light Sensor, Lunar will sync that adjustment to all your monitors.

Syncing also works with adjustments made by TouchBar or brightness keys.

React to the ambient light around you

Sensor Mode

Pro Feature

Sensor Mode brings adaptive brightness for any Mac device.

If you use a Mac Mini, a MacBook with the lid closed, or even a Hackintosh, Lunar can automatically adapt your monitors' brightness and contrast based on readings from an external ambient light sensor.

The sensor is wireless, can be powered by USB or Lithium-ion battery and can even be used for multiple computers as long as they're in the same network as the sensor.

Not available because of chip shortage

Do it yourself

Let the sun guide your brightness

Location Mode

Pro Feature

In Location Mode, Lunar will automatically adapt your monitors based on the sun position in the sky.

Location Mode shines in environments with lots of natural light, where the ambient light in the room correlates with the sun elevation.

If you're using a Mac Mini or a MacBook with the lid closed, Location Mode can be a good alternative because Sync Mode is not available without a built-in Ambient Light sensor.

If you still need the monitors to adapt to the light around you, Sensor Mode would be a better choice.

Put your monitors on a schedule

Clock Mode

Pro Feature

In Clock Mode, Lunar will automatically adapt your monitors based on a pre-defined schedule.

If you're working in a shared office and the sun shines from 9 to 5 no matter the season, Clock Mode is the thing for you.

There are 5 available schedules that can be set to any of the following schedule types:

  • Time: set the configured brightness and contrast at a specific time of day
  • Sunrise: set the configured brightness and contrast at sunrise
  • Noon: set the configured brightness and contrast when the sun is at its highest point in the sky
  • Sunset: set the configured brightness and contrast at sunset

For sunrise, sunset and noon there's a configurable offset, so you can do things like:

  • set brightness to 70%, 30 minutes before sunrise
  • set brightness to 30%, 1 hour and 30 minutes after sunset


Clock Mode supports the following transitions:

  • None: apply the brightness and contrast instantly on the defined time
  • 30 minutes: start transitioning slowly to the defined brightness and contrast 30 minutes before the schedule time
  • Full: transition brightness and contrast slowly from previous schedule until the next schedule

Fallback when DDC fails

Lunar can work around the lack of DDC support of some devices using two separate and very different methods.

Gamma Tables

The works out of the box method.

Lunar can approximate a decrease in brightness by changing the software gamma tables to make the colors look darker.

This doesn't change the hardware brightness as DDC does, so you have to manually set the monitor's brightness and contrast (using the monitor physical buttons) to the highest possible values that look good for your monitor.

This also means that monitor volume and input can't be controlled.

Network Control

The why do I have to do this? method...

If you want your DDC controls back, Lunar can use a Raspberry Pi with network access for this.

The way this works is by having the Pi connected to a separate HDMI port of your monitor and Lunar relaying the DDC commands through a custom server running on the Pi.

Minimum requirements

FaceLight for your FaceTime


Pro Feature

Use your monitor as a really bright LED panel when you're having video calls in your cozy dark room.

If having your face well lit in a video call is more important than screen space, Lunar can help you with a single hotkey.

Press Control+Command+5 or use the Lunar menu to activate FaceLight and Lunar will increase the active monitor's brightness and contrast to maximum and place a warm-white overlay on top of your screen.

Press the hotkey again to deactivate FaceLight and return to the previous brightness.

BlackOut distracting screens


Pro Feature

Focus on the real work by disabling screens that you don't need.

Sometimes you only need to see one screen, but you don't want to disconnect or turn off the other displays. In the case the MacBook internal display, turning off isn't even possible in an easy way.

BlackOut enables you to selectively turn off displays using a single hotkey.

Use cases:

  • Turn off just the MacBook display without closing the lid
  • Turn off just the external display while still charging the Macbook from its Thunderbolt cable

Press Control+Command+6 with the cursor on the monitor you want to disable to activate BlackOut.

Lunar will set the active monitor's brightness and contrast to 0 and mirror the other still visible screen to the disabled one so that you have all your windows visible.

Press the hotkey again to deactivate BlackOut and return to the previous brightness.

Auto-learning luminance curve

Forget about configuring obscure settings. Just set the monitor brightness to what you need and Lunar will learn from that.

All adaptive modes (Sync, Sensor, Location) support an auto-learning algorithm.

When the brightness or contrast of the monitor is not what you would expect it to be, change it to your preferred value, and Lunar will adjust its brightness/contrast curve to better match your own perception of light.

Works with M1

Lunar can use DDC to control monitors on all M1 Macs! (except the HDMI port of the Mac Mini and MacBook Pro)

Hardware Controls

Lunar can use the M1 GPU to communicate with monitors through the I²C protocol and do the following:

  • Change the hardware brightness and contrast
    • these are the same values that you can change through the monitor buttons
  • Adjust the volume
  • Switch the input
  • Power off the monitor

Command-Line Integration

Control and automate your monitors from the command-line.

  • lunar get and lunar set: Quickly set/get monitor values if you have a single external monitor
  • lunar displays: Control and query each display separately
  • lunar lux: Check the ambient light around you (only on M1 Macbooks and iMacs)
  • lunar builtin: Query the built-in display of the Macbook
  • lunar ddc: Send arbitrary DDC commands
  • lunar gamma: Control the Gamma tables per monitor
  • lunar lid: Check if the lid of the Macbook is open or closed
  • lunar ddcctl: Use ddcctl directly (only on Intel Macs)
  • lunar hotkeys: See all the hotkeys of Lunar

Lunar Pro

More details about each Pro feature here
FeatureFree versionLunar Pro
DDC Controls
Fallback when DDC fails
Brightness keys support
Volume keys support
Command-line integration
Input switching
Multi-monitor support
App Presets
Sync Mode
Location Mode
Sensor Mode
Clock Mode
Manual Mode100 adjustments per dayUnlimited adjustments
Pro Meteor Buy Lunar Pro