Experience the refreshed interface with the new Liquid Glass style in macOS Tahoe 26.
CotEditor 6.0.2
release:
Fixes
Fix an issue on macOS 26 where the application crashes by opening the Donation settings pane while a system theme color other than Multicolor is selected in the System Settings > Appearance.
Fix an issue where the theme setting changes unexpectedly when opening the Appearance settings pane after switching the system appearance mode.
Fix an issue where the indentation style detection doesn’t work.
CotEditor 6.0.1
release:
Improvements
Avoid assigning the Shift+Return shortcut key for a snippet.
trivial: Update find result messages.
dev: Update the build environment to Xcode 26.0.
non-AppStore ver.: Update Sparkle from 2.8.0-beta.3 to 2.8.0.
Fixes
Fix an issue where the file browser doesn't show the entire filenames when the scroller slot is shown.
Fix an issue where the “Convert Indentation” commands don’t convert if no characters are selected.
Fix an issue where the input fields in the Find window accept rich text.
Fix an issue where folder documents can open multiple windows for the same folder.
Address a potential crash that occurs when performing a keyboard shortcut.
Address a potential crash that can occur when opening a document on an Intel-based Mac.
trivial: Fix an issue where the default encoding pop-up button in the Format settings pane is positioned incorrectly.
CotEditor 6.0.0
release:
New Features
Support macOS Tahoe 26.
Improvements
Change the system requirement to macOS Sequoia 15 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.
Display the numbers of registered items below the lists in the syntax editor.
Deprecate the feature to change the editor opacity per window.
Deprecate the feature of installing a custom theme by simply opening the file in CotEditor.
Deprecate the “Make Snake Case,” “Make Camel Case,” “Make Pascal Case,” “Hiragana to Katakana,” and “Katakana to Hiragana” commands in the Text > Transformations menu.
Deprecate the “Draw separator” option for the line number view on macOS 26.
trivial: Rename the “Half-width to Full-width” and “Full-width to Half-width” commands to “Convert to Full Width” and “Convert to Half Width”, respectively.
trivial: Improve the behavior of Add/Remove buttons.
trivial: Update the layout of the “What’s New” window.
dev: Migrate the theme list and syntax list in the Settings, and the input fields in the Find window to SwiftUI.
dev: Update the build environment to Xcode 26.0 (Swift 6.2, macOS 26 SDK).
non-AppStore ver.: Add an update badge to the “Check for Update” menu item if an update is available.
non-AppStore ver.: Update Sparkle from 2.7.1 to 2.8.0.
Fixes
Fix an issue where the “Convert Indentation” commands don’t convert indentation to the indent style that’s not the default.
Fix an issue where the Syntax toolbar menu is disabled when the toolbar is shown afterward.
Fix an issue where the size of the Multiple Replace window is not stored.
Fix an issue in the Dutch localization where the number of found items isn’t displayed in the Find window.