Mac OS X, OS X, and macOS Version Information
| Rhapsody Developer Release |
Titan1U |
August 31, 1997 |
DR2 (May 14, 1998) |
| Mac OS X Server 1.0 |
Hera |
March 16, 1999 |
1.2v3 (October 27, 2000) |
| Mac OS X Developer Preview |
n/a |
March 16, 1999 |
DP4 (April 5, 2000) |
| Mac OS X Public Beta |
Kodiak |
September 13, 2000 |
n/a |
| Mac OS X 10.0 |
Cheetah |
March 24, 2001 |
10.0.4 (June 22, 2001) |
| Mac OS X 10.1 |
Puma |
September 25, 2001 |
10.1.5 (June 6, 2002) |
| Mac OS X 10.2 |
Jaguar |
August 24, 2002 |
10.2.8 (October 3, 2003) |
| Mac OS X 10.3 |
Panther |
October 24, 2003 |
10.3.9 (April 15, 2005) |
| Mac OS X 10.4 |
Tiger |
April 29, 2005 |
10.4.11 (November 14, 2007) |
| Mac OS X 10.5 |
Leopard |
October 26, 2007 |
10.5.8 (August 5, 2009) |
| Mac OS X 10.6 |
Snow Leopard |
August 28, 2009 |
10.6.8 v1.1 (July 25, 2011) |
| Mac OS X 10.7 |
Lion |
July 20, 2011 |
10.7.5 (September 19, 2012) |
| OS X 10.8 |
Mountain Lion |
July 25, 2012 |
10.8.5 (12F45) (October 3, 2013) |
| OS X 10.9 |
Mavericks |
October 22, 2013 |
10.9.5 (13F1112) (September 18, 2014) |
| OS X 10.10 |
Yosemite |
October 16, 2014 |
10.10.5 (14F27) (August 13, 2015) |
| OS X 10.11 |
El Capitan |
September 30, 2015 |
10.11.6 (15G31) (July 18, 2016) |
| macOS 10.12 |
Sierra |
September 20, 2016 |
10.12.6 (16G29) (July 19, 2017) |
| macOS 10.13 |
High Sierra |
September 25, 2017 |
10.13.6 (17G65) (July 9, 2018) |
| macOS 10.14 |
Mojave |
September 24, 2018 |
10.14 (18A391) (September 24, 2018) |
| macOS 10.15 |
Catalina |
October 7, 2019 |
10.15 (19A583) (October 7, 2019) |
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