https://github.com/strogonoff/macos-grayscale

An executable that forces display to grayscale on macOS.
https://github.com/strogonoff/macos-grayscale

accessibility macos

Last synced: 8 days ago
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An executable that forces display to grayscale on macOS.

• Host: GitHub
• URL: https://github.com/strogonoff/macos-grayscale
• Owner: strogonoff
• License: cc-by-sa-4.0
• Created: 2020-05-22T22:00:39.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2020-06-18T06:00:30.000Z (over 4 years ago)
• Last Synced: 2025-01-18T21:04:27.009Z (10 days ago)
• Topics: accessibility, macos
• Language: C
• Homepage:
• Size: 25.4 KB
• Stars: 2
• Watchers: 1
• Forks: 1
• Open Issues: 2
• Metadata Files:
  • Readme: README.rst
  • License: LICENSE

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README

        
An executable that forces display to grayscale on macOS.

This repo exists so that I don’t forget it next time I set up a Mac.

Based on

`StackExchange post by Lucas Wiman `_

(see also `this one `_

on enabling grayscale effect based on current app).

Licensed under CC BY-SA 4.0 like StackExchange requires.

Why

===

* Works together with color inversion.

* Can be assigned a keyboard shortcut.

As of Catalina, the above is impossible with native macOS

accessibility options.

Usage

=====

To compile, run ``make toggle-grayscale``.

To assign it a shortcut:

1. Copy compiled binary to a sane location

2. Using Automator, create a workflow (quick action)

   which receives no input in any application.

   In it, add “Run AppleScript” action with contents like::

       do shell script "~/bin/toggle-grayscale"

3. Assign preferred shortcut to that action in keyboard preferences.

Tested with

===========

OS: macOS Catalina 10.15.5

Compiler::

    Apple clang version 11.0.3 (clang-1103.0.32.59)

    Target: x86_64-apple-darwin19.4.0

    Thread model: posix

    InstalledDir: /Library/Developer/CommandLineTools/usr/bin

Known issues

============

Turning grayscale on and off this way does not toggle the Accessibility checkbox in Preferences.

Losing grayscale when switching to another display: `Issue `_.