The first thing should know about MacOS is that this is the official operating system developed by Apple and released in September 2001. It’s a Unix-based operating system with multi-user features. There are four kinds of MacOS available: MacOS X Server, MacOS X, special edition of Mac OS X which can run on Power PC (or G4/G5) and Intel based machines, as well as now end of life (and no longer updated) DVD. Below is a list version MacOS with each feature.
Here is a list, of the versions of macOS. And some of the major features, and improvements introduced in each release:
macOS 10.0 Cheetah
Release on March 24, 2001. This was the first version of macOS, and it introduce a new user interface, support for multiple users, and support for CD burning.
macOS 10.1 Puma
Release on September 25, 2001. This version introduce support for AirPort wireless networking and introduced the Finder Preferences panel.
macOS 10.2 Jaguar
Release on August 23, 2002. This version introduce a new version of the Finder, improved support for networking and file sharing, and introduced iChat.
macOS 10.3 Panther
Release on October 24, 2003. This version introduce a new Finder, improved support for Expose and Fast User Switching, and introduced Safari.
macOS 10.4 Tiger
Release on April 29, 2005. This version introduce a new version of the Finder, improved support for Dashboard and Spotlight, and introduced Automator.
macOS 10.5 Leopard
Release on October 26, 2007. This version introduce a new Finder, improved support for Time Machine. And Boot Camp, also introduce Spaces.
macOS 10.6 Snow Leopard
Release on August 28, 2009. This version introduce improved support for Exchange, also improved support for 64-bit applications. And introduced the Mac App Store.
macOS 10.7 Lion
Release on July 20, 2011. This version introduce a new version of the Finder, introduce Mission Control. And introduce Launchpad.
macOS 10.8 Mountain Lion
macOS 10.8 Mountain Lion: Release on July 25, 2012. This version introduce improve support for iCloud, introduce Notification Center. And introduce Messages.
macOS 10.9 Mavericks
Release on October 22, 2013. This version introduce improve support for multiple displays, introduce Finder Tabs. And introduce Apple Maps.
macOS 10.10 Yosemite
Release on October 16, 2014. This version introduce a redesign user interface, improve support for iCloud Drive. And introduce Continuity.
macOS 10.11 El Capitan
Release on September 30, 2015. This version introduce improve support for Split View, and improve security.
macOS 10.12 Sierra
Release on September 20, 2016. This version introduce improve support for Siri, introduce Apple Pay on the web. And introduce Universal Clipboard.
macOS 10.13 High Sierra
Release on September 25, 2017. This version introduce support for High Efficiency Video Coding (HEVC), improve support for Metal graphics technology. And introduce the APFS file system.
macOS 10.14 Mojave:
Release on September 24, 2018. This version introduce a redesign App Store, introduce Dark Mode. And introduce improve support for augmented reality.
macOS 10.15 Catalina
Release on October 7, 2019. This version introduce support for iPad apps on the Mac, introduce Project Catalyst. And introduced the Music, Podcasts, and TV apps.
macOS 11 Big Sur
Release on November 12, 2020. This version introduce a redesigne user interface, introduce the Control and Notification Center. Introduce improve Safari and Messages apps, also introduce support for Apple silicon.
macOS 12 Monterey
Release on 25 Oktober 2021. This version introduce Universal Control, AirPlay to Mac, Shortcuts, Safari tab groups, Photos
macOS 13 Ventura
Release on 24 Oktober 2022. includes changes, many related to productivity, and adds two apps ported from iOS and iPadOS