CotEditor

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 M

system requirements: macOS 14 and later

New Features

• Support Writing Tools with Apple Intelligence.

Improvements

• [beta] Adjust the window's appearance.
• [beta] Show icon image for alias files selected in the file browser.
• [beta] Add the Czech, Dutch, French, and Portuguese localizations for strings newly added in CotEditor 5.0.0.

Fixes

• [beta] Fix an issue that UNIX scripts failed to get the document object displayed in a window with the folder browser.
• [beta.3] Fix an issue that the editor unwontedly selects the nearest outline item when the Outline inspector is shown.

system requirements: macOS 14 and later

New Features

• [beta] Preview non-plain-text files.
• [beta] Support Quick Look in the file browser.

Improvements

• Update C++ syntax (Thanks to Léo Natan!).
• [beta] Add the Sidebar submenu to the View menu.
• [beta] Improve the VoiceOver support in the sidebar.
• [beta] Enable selecting multiple items in the file browser.
• [beta] Restore the filename to the original one when the filename edited in the file browser is invalid.
• [beta] Avoid opening with CotEditor itself when performing the “Open with External Editor” command in the file browser.
• [beta] Copy dropped fi

system requirements: macOS 14 and later

Improvements

• [trivial] Better numbering when adding a new setting whose name is the same as an existing one.
• [beta] Add the Duplicate and Share actions to the context menu for the sidebar.
• [bata] Make items in the sidebar copyable.
• [beta] Restore the expansion state of folders in the sidebar from the last session.
• [beta] Improve hidden file handling in the sidebar.
• [beta] Improve alias file handling in the sidebar.
• [beta] Enable opening directories from the cot command.
• [beta] Change the subtitle of document windows with the sidebar from the relative file path to the filename.

system requirements: macOS 14 and later

New Features

• Support macOS 15 Sequoia.
• Open folders in CotEditor and browse the folder contents from the new sidebar to switch documents.
• [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

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.

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

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

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:

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 updat

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