MacOS is the most fastest, user friendly, and most secure operating system offered by Apple since, 2001. MacOS is a series of different operating system from Apple. MacOS is based on the OS technology between 1986 to 1997 and UNIX system. There are different versions of MacOS released since 2001. Some names are based on animals and some are based on Islands.
Apple Operating System Version
OS X 10.0: Cheetah 2001
OS X 10.1: Puma 2001
OS X 10.2: Jaguar 2002
OS X 10.3 Panther 2003
OS X 10.4 Tiger 2005
OS X 10.5 Leopard 2007
OS X 10.6 Snow Leopard 2009
OS X 10.7 Lion 2011
OS X 10.8 Mountain Lion 2012
OS X 10.9 Mavericks 2013
OS X 10.10: Yosemite 2014
OS X 10.11: El Capitan 2015
macOS 10.12: Sierra 2016
macOS 10.13: High Sierra 2017
macOS 10.14: Mojave 2018
macOS 10.15: Catalina 2019
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