macOS Mojave Dark Mode
Apple finally offers a dark mode for the Mac that is built-in and that carries over to your apps. The new Dark Mode includes a darker desktop background and darker colors in all of the menus and settings.
This puts the focus on your content and isn't as blindingly bright when you are using your Mac at night. With Dark Mode enabled the built-in Mac apps like Mail, Messages, Maps, Calendar and Photos also appear on screen with a darker look.
With macOS 10.14.4, Safari will now automatically enable Dark Mode on websites that support a dark theme.
Apple allows third party apps to support Dark Mode. By the time the public Mojave release date arrives expect many of your favorite apps to support this feature.