With macOS Sierra, Mac players can do their job more easily and intelligently, you can now work with multiple applications simultaneously via Split View, easily pin your favorite websites. The performance, stability, and security of this version of the operating system have increased significantly. MacOS, formerly known as OS X or Mac OS, is Apple’s proprietary operating system, with macOS Sierra being the latest version of the operating system for PCs and Mac servers. macOS High Sierra Big Sur v10.13.6 (17G2208) Mac App Store.macOS Mojave 10.14.6 (18G103) Multilingual Mac App Store.macOS Catalina 10.15.7 (19H2) Multilanguage Mac App Store.macOS Big Sur 11.5.1 (20G80) Multilingual Mac App Store.
