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macOS

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macOS

The 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, Apple M1, macOS server and Mac computer.

Name Evolution
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

  2021   "macOS"     12.0    Monterey
  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 earlier, Mac OS 8.0 was the largest update to the Mac operating system since System 7.
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References in periodicals archive
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With macOS Catalina, Apple is introducing new assistive technologies to help every user get the most out of their Mac.
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Apple has recently previewed macOS Catalina, the latest version of the its desktop operating system, at the company's annual Worldwide Developers Conference held in San Francisco.
Apple pulls the plug on iTunes with latest macOS update
The new NCP Secure macOS Clients provide enhanced security including fingerprint authentication, said Patrick Oliver Graf, CEO of NCP engineering.
NCP ENGINEERING RELEASES NEW VPN CLIENTS FOR MACOS
"macOS Mojave is a major update that introduces powerful new features for a wide range of Mac users, from consumers to pros," said Craig Federighi, Apple's senior vice president of software engineering.
Apple launches new macOS Mojave with a sleek 'dark mode' at WWDC 2018; The latest version of macOS has a handy feature for clearing a cluttered desktop
Macos started his the fourth and last chukker with a field goal to reduce the margin to 6-3.
Ginazu helps Barry's clinch Aibak Polo Cup
DP/Guard Rice's Macos Araya then started playing aggressive polo and pumped in a field goal to reduce the margin to 4-2.
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