| Mac OS X 10.1 | Apple Inc. | 2001 | Apple Public Source License |
| Mac OS X 10.2 | Apple Inc. | 2002 | Apple Public Source License, end-user license agreement |
| Mac OS X Leopard | Apple Inc. | 2007 | Apple Public Source License, end-user license agreement |
| Mac OS X Lion | Apple Inc. | 2011 | Apple Public Source License |
| Mac OS X Panther | Apple Inc. | 2003 | — |
| Mac OS X Public Beta | Apple Inc. | — | — |
| Mac OS X Snow Leopard | Apple Inc. | 2009 | Apple Public Source License |
| Mac OS X Tiger | Apple Inc. | 2005 | — |
| MacOS Big Sur | Apple Inc. | 2020 | proprietary license, Apple Public Source License |
| MacOS Catalina | Apple Inc. | 2019 | Apple Public Source License |
| MacOS Golden Gate | Apple Inc. | 2026 | — |
| MacOS High Sierra | Apple Inc. | 2017 | Apple Public Source License |
| MacOS Mojave | Apple Inc. | 2018 | Apple Public Source License |
| MacOS Monterey | Apple Inc. | 2021 | proprietary license, Apple Public Source License |
| MacOS Sequoia | Apple Inc. | — | — |
| MacOS Sierra | Apple Inc. | 2016 | Apple Public Source License |
| MacOS Sonoma | Apple Inc. | — | — |
| MacOS Tahoe | — | — | — |
| MacOS Ventura | Apple Inc. | 2022 | — |
| OS X El Capitan | Apple Inc. | 2015 | Apple Public Source License |
| OS X Mavericks | Apple Inc. | 2013 | Apple Public Source License |
| OS X Mountain Lion | Apple Inc. | 2012 | Apple Public Source License |
| OS X Yosemite | Apple Inc. | 2014 | Apple Public Source License |
| What's Your Sign? | Objective-See | — | GNU General Public License, version 3.0 |