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Lightweight Plain-Text Editor for macOS

cocoa coteditor editor mac-app macos macos-app swift texteditor

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README.md

CotEditor

CotEditor is a lightweight plain-text editor for macOS. The project aims to provide a general plain-text editor for everyone with an intuitive macOS-native user interface.

Requirement: macOS 14 Sonoma or later
Web Site: https://coteditor.com
Mac App Store: https://itunes.apple.com/app/coteditor/id1024640650?ls=1
Languages: English, Czech, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese, Spanish, Simplified Chinese, Traditional Chinese, and Turkish

Source Code

CotEditor is a purely macOS native application written in Swift. It adopts Cocoa's document-based application architecture and respects the power of NSTextView.

Development Environment

macOS 15 Sequoia
Xcode 16
Swift 6 (partly in Swift 5 mode)
Sandbox and hardened runtime enabled

Contribution

CotEditor has its own contributing guidelines. Read CONTRIBUTING.md through before you create an issue or make a pull request.

How to Build

Build for Ad-hoc usage

For those people who just want to build and play with CotEditor locally.

Open CotEditor.xcodeproj in Xcode.
Change to ad-hoc build mode:
1. Open Configurations/CodeSigning.xcconfig.
2. Comment out #include "CodeSigning-Default.xcconfig".
3. Uncomment #include "CodeSigning-AdHoc.xcconfig".
Build “CotEditor” scheme.

Build for distribution

Open CotEditor.xcodeproj in Xcode.
Build “CotEditor” scheme.

License

The source code is licensed under the terms of the Apache License, Version 2.0. The image resources are licensed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. See LICENSE for details.