OS X Yosemite – 10

macOS Mojave – 10.14

macOS Catalina – 10.15

macOS Mojave (version 10.14), first released on September 24, 2018, is the fifteenth major release of OS X, renamed macOS, Apple’s desktop and server operating system for Macintosh computers. It is the successor to macOS High Sierra and the predecessor of macOS Catalina. Following the California landmark-based naming scheme introduced with OS X Mavericks, Mojave was named after the Mojave desert. The standout feature in macOS Mojave is a system-wide Dark Mode, which extends beyond just the dock and the menu bar to full windows and apps, with native apps like Mail, Calendar, iTunes, Xcode, and more adopting the dark theme. Dark Mode is, of course, an optional feature, so users who prefer a lighter look can continue to use the light mode.

A Dynamic Desktop option introduces wallpapers that subtly change throughout the day, while Desktop Stacks organize all your desktop files into neat piles arranged by type, date, or tag. Finder has been revamped with a Gallery View for previewing files one by one, and a Finder Sidebar offers up file information at a glance.

macOS Catalina (version 10.15), released on October 7, 2019, is the sixteenth major release of OS X, renamed macOS, Apple’s desktop and server operating system for Macintosh computers. Announced on June 3 at the 2019 Worldwide Developers Conference, it is the successor to macOS Mojave and the predecessor to macOS Big Sur. Following the California landmark-based naming scheme introduced with OS X Mavericks, Catalina was named after Santa Catalina Island, located in Southern California.