5.0.0

system requirements: macOS 14 and later

New Features

• Folder Navigation: Open folders in CotEditor and browse their contents from the new sidebar to switch documents.
• Support macOS 15 Sequoia.
• Support Writing Tools with Apple Intelligence.
• [AppStore ver.] Now, the user can donate to the CotEditor project via in-app purchase in the new Donate settings pane.
• Add new “Select Enclosing Symbols” and “Split Selection by Lines” commands to the Edit > Select menu.
• Add new “Show in Finder” command to the File menu.
• Add new “Create Document in CotEditor” shortcut action.
• Add the “Highlight” color to the CotEditor theme format.
• Support the alpha channel for the current line in theme settings.
• Add Korean localization (Thanks to Minseok Choe!).
• Add Assembly syntax.
• Add new “Resinifictrix (Dark)” theme.

Improvements

• Change the system requirement to macOS 14 Sonoma and later.
• Add “Select Column Up/Down“ commands to the Edit > Select menu.
• Change the unit of character ranges handled in CotEditor Scripting for AppleScript from UTF-16 based to the Unicode grapheme cluster-based (This is to follow the specification change in AppleScript 2.0 introduced in Mac OS X 10.5).
• Improve VoiceOver support in the Quick Action bar.
• Update all the bundled themes to have the custom highlight color and a 70% opacity in the current line highlight.
• Improve the performance of counting values in the editor for the status bar and the document inspector to avoid flicking of the display.
• Set the editor's kerning to zero when a monospaced font is set via the Font panel.
• Update the cot command to ignore piped text if a file to open is specified.
• Rename the “New CotEditor Document with Selection” service with “New CotEditor Window Containing Selection.”
• Enable opening the Color Code window even without any documents.
• Ignore empty outline items.
• Avoid the theme loading error when a value is missing.
• Make more table columns sortable.
• Update the Swift syntax.
• Update C++ syntax (Thanks to Léo Natan!).
• Improve the User Guide contents.
• Remove Solarized themes from the bundle.
• [trivial] Organize the structure of the Edit menu.
• [trivial] Suppress display of the “Extracting” message on the navigation bar in instantaneous parsing.
• [trivial] Make names of code contributors in the About window selectable.
• [dev] Update the build environment to Xcode 16 (Swift 6, macOS 15 SDK).
• [dev] Migrate all unit tests to Swift Testing.
• [dev] Migrate the navigation bar and the Snippets settings view to SwiftUI.
• [dev] Update Yams from 5.1.2 to 5.1.3.

Fixes

• Fix an issue that the rectangular selection cannot stop the selection just until the second line from the end.
• Fix an issue that the English labels in the issue report template were unnecessarily localized.

Full Changelog: 4.8.7...5.0.0

4.8.7

system requirements: macOS 13 and later

Improvements

• Change to disable the smart quotes option in the Mode settings by default.
• Draw invisible operators (U+2061, U+2062, U+2063, and U+2064) as invisible control symbols.
• Update the Lisp, Lua, Scheme, and Tcl syntaxes to update interpreters (thanks to Renfei!).
• [non-AppStore ver.] Update Sparkle from 2.6.3 to 2.6.4.

Fixes

• Fix an issue that a document kept in the Dock was not brought to the front on the reopen event even though no documents were displayed.
• Fix an issue that the line number view went under the toolbar when the text orientation was vertical and the navigation bar was hidden.
• Fix the view layout in the Quick Action bar.
• Fix a potential memory leak.

Full Changelog: 4.8.6...4.8.7

4.8.6

system requirements: macOS 13 and later

Implements

• Update the Markdown syntax to fix highlighting strikethrough.
• Disable color wells in the theme editor when they use the system color.
• Improve the User Guide contents.
• [non-AppStore ver.] Update Sparkle from 2.6.2 to 2.6.3.

Fixes

• Fix an issue that a saved document could not revert to the horizontal text orientation when it was saved once as a vertical text document.
• Fix a trivial memory leak in the line ending menu (thanks to Yoshimasa Niwa).

Full Changelog: 4.8.5...4.8.6

4.8.5

system requirements: macOS 13 and later

New Features

• Add jq Syntax.

Improvements

• Improve the file path display in the document inspector.

Fixes

• Fix an issue that the application crashed by opening the Appearance settings pane when the font the user set did not exist.
• Fix an issue in the syntax editor that the Values pane was missing in the highlighting list in the sidebar.
• Fix an issue in the Save dialog that the file extension disappeared when the user selected the Hide Extension option.
• Fix an issue that the font fields in the Appearance settings pane could unnecessarily shrunk with specific fonts.

Full Changelog: 4.8.4...4.8.5

4.8.4

system requirements: macOS 13 and later

Improvements

• Revert the “Do Nothing” option, which was once deprecated on CotEditor 4.6.0, for the “When nothing else is open” setting.
• Enable toolbar/menu items for the document editor even when the focus is on the inspector.
• Display a warning on setting renaming if the name contains “:”.
• [dev] Update the build environment to Xcode 15.4.

Fixes

• Fix an issue on CotEditor 4.8.3 that The Open dialog always shows up on launch despite the setting when the “Reopen windows from last session” option is disabled.
• Fix an issue on the version browsing that document windows could become occasionally transparent.
• Fix a typo in the Czech localization.

Full Changelog: 4.8.3...4.8.4

4.8.3

system requirements: macOS 13 and later

New Features

• Add the “Show in Finder” button next to the file path in the document inspector.

Improvements

• Display the current editor mode in the document inspector.
• Use more appropriate system color for the selection background when dark mode or not differs between the editor and theme.
• Improve VoiceOver support.
• Deprecate exact recalculation of insertion points when documents are updated by external processes to improve application stability.
• Improve stability of application launch behavior.
• Update the Markdown syntax to distinguish strong emphases (strong) from normal emphases (em).
• [non-AppStore ver.] Update Sparkle from 2.6.0 to 2.6.2 (security update).

Fixes

• Fix an issue that the application could not respond to by updating a relatively large document from external processes.
• Fix an issue that the application unwontedly copied the bundled theme setting files to the user domain.
• Fix an issue that the Share command was not available in the theme setting list.
• Fix the layout of the Go To Line dialog.
• Fix an incorrect label in the theme editor in the Appearance settings.

Full Changelog: 4.8.2...4.8.3

4.8.2

system requirements: macOS 13 and later

Improvements

• Disable smart dash for the General mode by default.
• Update the JavaScript, Swift, and TOML syntaxes.

Fixes

• Fix an issue on CotEditor 4.8.1 that opening some kinds of documents took a long time.
• Fix an issue on CotEditor 4.8.0 that the editor displayed nothing when the mode setting is empty.
• Fix an issue on CotEditor 4.8.0 that custom syntaxes could be ignored when it contains ill-formed file mapping definitions.
• Fix syntax highlighting for simple words.

Full Changelog: 4.8.1...4.8.2

4.8.1

system requirements: macOS 13 and later

Improvements

• Add context menus for text size change to the tables in the outline inspector and find the result view.
• Improve the algorithm to parse syntax highlighting with simple words.
• Improve error message when failing to load setting files.
• Improve general stability.

Fixes

• Address an issue on CotEditor 4.8.0 that the application could crash while updating the editor counts.
• Fix an issue on CotEditor 4.8.0 that custom syntaxes could be empty when it contains ill-formed definitions.
• Fix an issue on CotEditor 4.8.0 that the editor's kerning did not set to zero despite the font type being monospaced.
• Fix an issue on CotEditor 4.8.0 that some steppers in the Settings window were placed on the opposite side.
• Fix an issue that the application crashed when the sort key in the Sort by Pattern contains only whitespace.
• Fix an issue that the current line highlight did not appear when the insertion point was located at the last empty line.
• Fix an issue that the same instance highlight remains under specific conditions.

Full Changelog: 4.8.0...4.8.1

4.8.0

system requirements: macOS 13 and later

New Features

• Add the Mode feature that enables altering the editor’s behavior depending on the document’s syntax (Go Settings > Mode settings pane to set).
• Add the Restore Defaults button to the File Drop settings.
• Add Dutch localization (thanks to Yasin Gunaydin!).

Improvements

• Improve the look and feel of the syntax editor.
• Renew the “About CotEditor” window.
• Change the line count behavior to ignore the new line character at the end of the last line.
• Improve selected line number emphasis in the line number view by the vertical text orientation.
• Change the filter field for the outline inspector to apply the selection of the filter history immediately.
• Make the encoding priority view undoable.
• Disable the pane transition animation in the Settings window when the user sets to reduce motion in the system Accessibility settings.
• Deprecate “Append a space to comment delimiter” option.
• Remove wrapped line marks in the line number view.
• Update the Makefile syntax to add “GNUmakefile” to the filename mapping.
• [non-AppStore ver.] Update Sparkle from 2.5.2 to 2.6.0.
• [trivial] Enable delete selected separators in the encoding priority view with the Delete key.
• [trivial] Avoid users using reserved syntax names.
• [trivial] Remove the dialog urging to restart the application by changing the “Reopen windows from last session” option in the General settings pane.
• [dev] Migrate the settings window, syntax editor, and status bar to SwiftUI.
• [dev] Migrate all localizable strings to String Catalog.
• [dev] Update the build environment to Xcode 15.3 (Swift 5.10).
• [dev] Update Yams from 5.0.6 to 5.1.2.

Fixes

• Fix an issue that the application crashed when trying to share a custom syntax.
• Fix an issue on the filter field for the outline inspector that the filter history was initially empty.
• Fix an issue on macOS 14 that multiple cursors in editors remained when they are inactive.
• Fix missing localizations.

Full Changelog: 4.7.4...4.8.0

4.7.4

system requirements: macOS 13 and later

New Features

• Support the alpha channel in theme settings (Custom themes using alpha channel are not compatible with CotEditor prior to version 4.7.4).
• Make sections in the document inspector collapsable.
• Add “Hexadecimal with Alpha” format to the Color Code panel.
• Add Czech localization (Thanks to Martin Růžička!).

Improvements

• Tweak the background color of the “Anura (Dark)” theme.
• [dev] Migrate all the inspector panes to SwiftUI.

Fixes

• Fix an issue on macOS 13 that the stepper in the custom tab width view worked only once.
• Fix an issue that the character code point displayed in the document inspector could be broken when the application is localized.
• Fix an issue that the custom font size for the outline inspector was not fully applied.
• Fix an issue that the menu of the Syntax toolbar item could also check the previous one.
• Fix an issue that a part of the Portuguese localization was not applied.
• Fix Italian localization (Thanks to Roccobot and DAnn2012!).