macOS Code Names
List of Apple's code names for all OS X (now "macOS") versions.
OS Version
Code Name
Release Date
Public Beta
Kodiak
September 13, 2000
10.0
Cheetah
March 24, 2001
10.1
Puma
September 25th, 2001
10.2
Jaguar
August 23, 2002
10.3
Panther
October 24, 2003
10.4
Tiger
April 29, 2005
10.5
Leopard
October 26, 2007
10.6
Snow Leopard
August 28, 2009
10.7
Lion
July 20, 2011
10.8
Mountain Lion
July 25, 2012
10.9
Mavericks
October 22, 2013
10.10
Yosemite
October 16, 2014
10.11
El Capitan
September 30, 2015
10.12
Sierra (1)
September 20, 2016
10.13
High Sierra
September 25, 2017
10.14
Mojave
September 24, 2018
10.15
Catalina
October 7, 2019
11
Big Sur
November 17, 2020
12
Monterey
October 25, 2021
13
Ventura
October 24, 2022
14
Sonoma
September 26, 2023
15
Sequoia
September 16, 2024
1. First release to move from "OS X" name to "macOS," most likely to bring it in line with the iOS and tvOS naming convention.