BCD

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Use Itsycal on your Mac from ChatGPT or Claude

Menu bar calendar. With BCD, ChatGPT, Claude and other AI apps can open Itsycal on your Mac, read its window and press buttons or type, from your phone or another computer.

Works on

About Itsycal

Version
0.28.0
Installs (last 365 days)
10,541 · #179 among Homebrew apps
Updates
Updates itself
Homepage
www.mowglii.com/itsycal
Install
brew install --cask itsycal

Try asking

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

Questions

Can ChatGPT control Itsycal?
On a Mac with BCD, yes, through the app's window: ChatGPT can open Itsycal, 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 Itsycal 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.