CotEditor

system requirements: macOS 15 and later

Improvements

• [non-AppStore ver.] Update Sparkle from 2.9.0 to 2.9.1.
• [beta] Tweak outline item icons.
• [beta] Optimize the outline extraction algorithm.
• [beta] Optimize the regex-based syntax highlighting algorithm.
• [beta] Improve the Python outline to extract class variables.
• [beta] Add missing localizations.
• [beta] Update tree-sitter-rust to 0.24.2.

Fixes

• Fix an issue where re-importing a TSV file to overwrite an existing multiple replace definition could fail.
• [beta] Fix outline extraction in the LaTeX and Swift syntaxes.

Full Chan

system requirements: macOS 15 and later

Compatibility Changes

• Introduce CotEditor Syntax, a new syntax definition format (the legacy YAML-based syntax definition format is now deprecated; user-created syntaxes are automatically migrated on first launch).

New Features

• Adopt smarter syntax parsing powered by tree-sitter for multiple built-in syntaxes, improving syntax highlighting and outline extraction in C, C#, C++, CSS, Go, HTML, Java, JavaScript, Kotlin, LaTeX, Lua, Makefile, Markdown (outline extraction only), PHP, Python, Ruby, Rust, Scala, Shell Script, SQL, Swift, and TypeScript.
• Display symbolic icons next to outline items.
• Allow collapsi

system requirements: macOS 15 and later

Improvements

• Improve stability on MacBook Pro models with Touch Bar.
• [dev] Update the build environment to Xcode 26.4.

Fixes

• Fix a crash on exporting settings when some setting values are not customized.
• Fix a potential crash in Find All when a matched line is extremely long.
• Address a potential crash when editing a keyboard shortcut in the snippets settings.

Full Changelog: 6.2.5...6.2.6

system requirements: macOS 15 and later

Improvements

• Create a new document from a UNIX script only when output is available, using the %%%{CotEditorXOutput=NewDocument}%%% option.
• Improve overall stability.

Fixes

• Fix an issue where the default file extension for Markdown documents was .txt instead of .md.
• Fix an issue where snippets were not included in the settings export.
• Fix an issue where settings imported from a settings archive incorrectly included filename extensions.
• Fix an issue where invisible characters were not printed even if the “Print Invisible” option in the print settings was enabled.
• Fix descriptions in the user guide for UNIX scripting.
• Address a potential crash in the file browser when c

system requirements: macOS 15 and later

Improvements

• [non-AppStore ver.] Update Sparkle from 2.8.1 to 2.9.0.
• [dev] Update the build environment to Xcode 26.3.

Fixes

• Fix an issue where smart indentation did not work under certain conditions.
• Fix an issue in the Find window where syntax highlighting for regular expressions could break for some patterns.
• Fix an issue where the editor incorrectly highlighted paired symbols when an escaped symbol was nearby.
• Fix an issue in the file browser where TypeScript documents were incorrectly displayed with a video icon.
• Address a potential crash when pasting multiline text into the editor under certain conditions.
• Address a potential crash when closing a document.

system requirements: macOS 15 and later

New Features

• Add AppleScript support for folder document, including the current document property and forwarding of document commands.

Improvements

• Optimize the performance of scanning incompatible characters.
• Accept the JSON5 format when importing custom themes and multiple replace definitions.
• Improve the behavior of trailing whitespace trimming.
• Update the JSON syntax to highlight comments in the JSON5 format.
• Improve overall stability.
• [dev] Update the build environment to Xcode 26.3-rc.

Fixes

• Fix an issue where the app could crash when opening a large file while the Warnings inspector was open.

system requirements: macOS 15 and later

New Features

• Add the --goto option to the cot command-line tool as syntactic sugar for the --line and --column options. See --help or the user guide for details.
• Add Chinese (Hong Kong) localization (thanks to changanmoon!).

Improvements

• Improve the text encoding detection algorithm.
• Update the C++ syntax to include the .cu and .cuh filename extensions.

Fixes

• Fix an issue in the syntax editor where the outline title field occasionally became uneditable.
• Fix an issue in the Outline inspector where matches filtered by the filter field were not highlighted.
• Update the Swift syntax to fix outlin

system requirements: macOS 15 and later

Improvements

• Improve word deletion to treat periods and colons as word delimiters.
• Update the filter after duplicating a file in the file browser.
• Update the user guide.

Fixes

• Fix an issue in the file browser where files weren’t hidden when the document’s folder name matched the filter string.
• Fix an issue where the app crashed when cutting rectangular selections at the end of a document with CRLF line endings.

Full Changelog: 6.2.0...6.2.1

system requirements: macOS 15 and later

New Features

• Add a feature to export and import settings to transfer them to another Mac.
• Allow opening alias and symlink documents from the file browser.
• Request file access permission from the user by the “Open in New Window” command instead of simply presenting an error when CotEditor doesn’t have permission.
• Display the original path for alias and symlink files in file preview views.
• Support for importing multiple replace definitions from tab-separated values.

Improvements

• Syntax highlighting now takes nesting into account when highlighting symbol pairs.
• Update the Lua syntax to support nested string delimiters.
• Update the contents and layout of the user guide.

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system requirements: macOS 15 and later

Improvements

• [dev] Update the build environment to Xcode 26.2 RC.
• [beta] Add missing localizations.
• [beta] Update the user guide.

Fixes

• Fix an issue where the default syntax setting reverted to Plain Text after a short time when set to None.

system requirements: macOS 15 and later

Improvements

• [beta] Add missing localizations.
• [beta] Update the user guide.

Fixes

• Fix an issue in the Donation settings pane where the purchase button for the one-time donation didn’t work on subsequent attempts.
• Address an issue where scrolling the editor with arrow keys caused unexpected jumps.

Known Issues

• The text added to CotEditor 6.2.0 are not yet localized to Simplified Chinese and Portuguese.

Full Changelog: 6.2.0-beta.3...6.2.0-beta.4