CotEditor

system requirements: macOS 15 and later

Improvements

• [beta] Adjust the user interface.
• [beta] Avoid tinging folder with tags in the file browser on macOS 15.
• [beta] Tweak the application icon.
• [beta][dev] Update the build environment to Xcode 26.0 Beta 7.

Full Changelog: 6.0.0-beta...6.0.0-beta.2

system requirements: macOS 15 and later

New Features

• Support macOS Tahoe 26.

Improvements

• Change the system requirement to macOS 15 Sequoia and later.
• Update the user interface on macOS 26 to the Liquid Glass style.
• Update the application icon to the Liquid Glass style.
• The options to highlight matching braces have been removed and they are now always highlighted.
• Apply the text find highlighting to all split editors.
• Move selected items to the Trash by the Delete action in the file browser.
• Show also the file size of the previewed document in the status bar.
• Dep

system requirements: macOS 14 and later

Improvements

• Update the CSS and Go syntaxes to highlight more keywords (thanks to Karam!).
• [dev] Update Yams from 6.0.2 to 6.1.0.

Full Changelog: 5.2.2...5.2.3

system requirements: macOS 14 and later

Fixes

• Fix an issue in CotEditor 5.2.1 where the text color in the text fields within the Find window appears black in the dark mode.

Full Changelog: 5.2.1...5.2.2

system requirements: macOS 14 and later

Improvements

• Update the CSS syntax to highlight more keywords (thanks to Karam!).
• Update the JavaScript syntax to highlight placeholders in template literals.

Fixes

• Fix an issue where the state of the Text Replacement option in modes is not saved.
• Fix an issue where shortcuts could be assigned in the Key Bindings settings to menu commands that perform multiple replacements, even though these shortcuts didn’t actually work.
• Fix an issue where the font in the input fields of the Find window would occasionally be replaced by a fallback font.
• Fix an issue where the options button in the advanced character count doesn’t work.

Full Changelog: 5.2.0...5.2.1

system requirements: macOS 14 and later

New Features

• Allow adding and removing text encodings from the text encoding list, and enabling the handling of a wider range of encodings.
• Add the Xcode Project syntax (.pbxproj).
• Add the Metal syntax (thanks to Aybars Nazlica!).

Improvements

• Improve differentiation without color.
• Update the CSS syntax to highlight more keywords (thanks to Karam!).
• Update the HTML syntax to highlight more keywords (thanks to Karam!).
• [trivial] Adjust the layout of the multiple replacement definition editor.
• [non-AppStore ver.] Update Sparkle from 2.7.0 to 2.7.1.
• [dev] Update Yams from 6.0.1 to 6.0.2.

Fixes

• Fix an issue where opening a document

system requirements: macOS 14 and later

Improvements

• [trivial] Adjust the layout of the multiple replacement definition editor.
• [dev] Update Yams from 6.0.1 to 6.0.2.
• [beta] Update Korean, Polish, and Portuguese localizations.

Fixes

• Fix an issue where opening a document with mixed line endings incorrectly unifies them to the dominant line ending when it is not LF.
• Fix an issue where a document containing incompatible characters cannot be closed without lossy saving.
• Fix an issue where the text encoding of restored documents could be incorrectly set to Unicode (UTF-8).

Full Changelog:

system requirements: macOS 14 and later

New Features

• Allow adding and removing text encodings from the text encoding list, and enabling the handling of a wider range of encodings.
• Add the Xcode Project syntax (.pbxproj).
• Add the Metal syntax (thanks to Aybars Nazlica!).

Improvements

• Improve differentiation without color.
• Update the CSS syntax to highlight more keywords (thanks to Karam!).
• Update the HTML syntax to highlight more keywords (thanks to Karam!).
• [non-AppStore ver.] Update Sparkle from 2.7.0 to 2.7.1.

Fixes

• Fix an issue where the Option-Dele

system requirements: macOS 14 and later

Improvements

• Update the HTML syntax to highlight ARIA attributes (thanks to Karam!).
• [trivial] Update the User Guide.
• [dev] Update Yams from 6.0.0 to 6.0.1.

Fixes

• [dev] Fix an issue on macOS 26 beta where the editor goes under the titlebar.

Full Changelog: 5.1.7...5.1.8

system requirements: macOS 14 and later

New Features

• Enhance the content of the file preview view for the file browser.
• Add the “Copy File Path” command to the File menu as an alternative to the “Show in Finder” command, which can be shown while pressing the Option key.

Improvements

• Update the CSS syntax to add new keywords (thanks to Karam!).
• Improve the VoiceOver support in folder documents.
• Improve the Spanish localization (thanks to Hector!).
• [dev] Update the build environment to Xcode 16.4.
• [dev] Update Yams from 5.3.1 to 6.0.0.

Fixes

• [trivial] Fix the layout of the file browser when a filename contains line ending characters.

Full Changelog: <

system requirements: macOS 14 and later

Improvements

• [trivial] Improve the Recently Used list of syntaxes in the toolbar item.

Fixes

• Fix an issue where an existing document may unintentionally shift when a new document is opened.
• [trivial] Fix an issue where the titlebar separator in the inspector is drawn in the incorrect position when the tab bar is shown.

Full Changelog: 5.1.6...5.1.6