4 Dark Mode
Mojave is the first OS update that gives Macs a real, full dark mode to play with. Dark modes invert and adjust colors across operating systems to turn things – well, dark. Whites and blues are replaced with blacks and grays, etc.
This is a very popular addition that many people have been waiting for. Some find dark modes much easier on their eyes. Some switch to dark mode at night or when working in the dark so they don’t get blinded. Others just like how it looks. Whichever preference, you can expect to spot a lot more dark mode Mac screens around. If you’re a little jealous, you have yet another reason to switch to Mojave. System Preferences > General > Appearance.