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Mac OS(MAC Operating System) See macOS.
macOSThe name of Apple's Unix-based operating system for Mac desktop and laptop computers. macOS is a continuation of the Mac OS X operating system, which was rebranded as macOS starting with the Sierra version in 2016.
Since its introduction in 1984, the Mac operating system has had five brand names (see below) and was designed to work with four hardware lines: Motorola, PowerPC, Intel and ARM. See Motorola, PowerPC, Intel Mac, ARM Mac, macOS server and Mac computer.
The Mac originally used "System" designations for its operating system, which then became "Mac OS." Starting in 1999, Mac OS X was a major upgrade that was branded with animal names followed by places in California (see Mac OS X).
YearIntro. Name Versions 2020 "macOS" 11.0 Big Sur 2019 "macOS" 10.15 Catalina 2018 "macOS" 10.14 Mojave 2017 "macOS" 10.13 High Sierra 2016 "macOS" 10.12 Sierra 2013 "OS X" 10.9 to 10.11 1999 "Mac OS X" 10.0 to 10.8 1995 "Mac OS" 7.6 to 9.2 1984 "System" 1 to 7.5
|Long Live the Mac Operating System|
|Introduced in 1999, Mac OS 8.6 was the first time the version number appeared on the Mac startup screen. Two years before, Mac OS 8.0 was the largest update to the Mac operating system since System 7.|
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