BCD

Mac apps › L

Use Lunar on your Mac from ChatGPT or Claude

Adaptive brightness for external displays. With BCD, ChatGPT, Claude and other AI apps can open Lunar on your Mac, read its window and press buttons or type, from your phone or another computer.

Works on

About Lunar

Version
7.0.0b23
Installs (last 365 days)
9,679 · #187 among Homebrew apps
Needs
macOS 14 or later
Updates
Updates itself
Homepage
lunar.fyi
Install
brew install --cask lunar

Try asking

“Open Lunar and tell me what is on its screen”
“Install Lunar with Homebrew”
“Quit Lunar and update it to the latest version”

Questions

Can ChatGPT control Lunar?
On a Mac with BCD, yes, through the app's window: ChatGPT can open Lunar, read the buttons and text it shows, press buttons, type and pick menu items. How far that goes depends on how much of its window Lunar exposes to macOS accessibility.

Does this work on Windows?
No. BCD controls app windows only on a Mac. On Windows and Linux it works with files and commands.

Is it safe?
A new computer starts read-only. Controlling the screen and apps is turned on per computer, and macOS asks once before BCD may control apps.

Try it on your computer

BCD connects ChatGPT, Claude and other AI apps to your own Mac, Windows or Linux computer. One computer is free, with 20,000 tool calls a month and no card.

Program data from Homebrew, updated 2026-11-11. Installs are Homebrew's installs on request over the last 365 days.