Use Harper Desktop on your Mac from ChatGPT or Claude
Grammar checker for developers. With BCD, ChatGPT, Claude and other AI apps can open Harper Desktop on your Mac, read its window and press buttons or type, from your phone or another computer.
Works on
- MacPartly
Through the app's window, with macOS accessibility: BCD reads what Harper Desktop shows and presses buttons, types and picks menus. How far it goes depends on the app. macOS asks once to allow it.
- WindowsNo
BCD controls app windows only on a Mac.
- LinuxNo
BCD controls app windows only on a Mac.
About Harper Desktop
- Version
- 3.1.0
- Installs (last 365 days)
- 411 · #1,326 among Homebrew apps
- Needs
- macOS 14 or later
- Homepage
- writewithharper.com
- Install
brew install --cask harper-desktop
Try asking
“Open Harper Desktop and tell me what is on its screen”
“Install Harper Desktop with Homebrew”
“Quit Harper Desktop and update it to the latest version”
Questions
Can ChatGPT control Harper Desktop?
On a Mac with BCD, yes, through the app's window: ChatGPT can open Harper Desktop, 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 Harper Desktop 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.