Macintosh Operating Systems by Apple

macOS 26 Tahoe Release schedule late 2025 - Upcoming Support

macOS 15 Sequoia Released September 2024

macOS 14 Sonoma Released September 2023

macOS 13 Ventura Released October 2022

macOS 12 Monterey Released October 2021

macOS 11 Big Sur Released November 2020

macOS 10.15 Catalina Released October 2019

macOS 10.14 Mojave Released September 2018

macOS 10.13 High Sierra Released September 2017

macOS 10.12 Sierra Released September 2016

Mac OS 10.11 X El Capitan Released September 2015

Mac OS 10.10 X Yosemite Released October 2014

Mac OS 10.9 X Mavericks Released October 2013

Mac OS 10.8 X Mountain Lion Released July 2012

Mac OS 10.7 X Lion Released July 2011

Mac OS 10.6 X Snow Leopard Released August 2009

Mac OS 10.5 X Leopard Released October 2007

Mac OS 10.4 X Tiger Released April 2005

Mac OS 10.3 X Panther Released October 2003

Mac OS 10.2 X Jaguar Released August 2002

Mac OS 10.1 X Puma Released September 2001

Mac OS 10.0 X Cheetah Released March 2001

Mac OS 9.2 Released July 2001

Mac OS 9.1 Released January 2001

Mac OS 9.0 Released October 1999

Mac OS 8.6 Released May 1999

Mac OS 8.5 Released October 1998

Mac OS 8.1 Released January 1998

Mac OS 8.0 Released July 1997

Mac OS 7.6 Released September 1994

Macintosh System Software 7.5 Released September 1994

Macintosh System Software 7.1 Released August 1991

Macintosh System Software 7.0 Released May 1991

Macintosh System Software 6.0 Released April 1988

Macintosh System Software 5.1 Released November 1987

Macintosh System Software 5.0 Released October 1987

Macintosh System Software 4.1 Released May 1987

Macintosh System Software 4.0 Released March 1987

Macintosh AppleShare (2.0) 3.4 Released 1988

Macintosh AppleShare (1.1) 3.3 Released 1987

Macintosh AppleShare (1.0) 3.3 Released January 1987

Macintosh System Software 3.2 Released June 1986

Macintosh System Software 3.1 Released February 1986

Macintosh System Software 3.0 Released January 1986

Macintosh System Software 2.1 Released September 1985

Macintosh System Software 2.0 Released April 1985

Macintosh System Software 1.1 Released May 1984

Macintosh System Software 0.97 Released January 1984