Nightfall
A menu bar utility for toggling dark mode in macOS, written in Swift
...This shortcut can be configured in System Preferences: in Keyboard preferences, look for “Toggle Dark Mode” under Shortcuts, Services, General. If “Animated transition“ is enabled in preferences, Nightfall will smooth over the transition between light and dark modes with a short animation. Because of how this feature works, you’ll need to grant Nightfall screen recording permissions. If you’d like to hide Nightfall from your menu bar without quitting the app, you can do so by holding the Command key and dragging the icon out of the menu bar. To reveal Nightfall again, re-open the app while it’s still running. ...