Use About This Mac to find out which Mac operating system (macOS) is installed on your Mac, and learn whether it's the latest (newest, most recent) version.
Which macOS is installed?From the Apple menu in the upper-left corner of your screen, choose About This Mac. The window that opens might look different from the example shown here, but it always includes the macOS name and version number. If you need to know the build number as well, click the version number to see it.
Which versions of macOS are the latest?These are the latest versions of each Mac operating system, starting with the most recent.
macOS
Latest version
macOS Sequoia
15.5
macOS Sonoma
14.7.6
macOS Ventura
13.7.6
macOS Monterey
12.7.6
macOS Big Sur
11.7.10
macOS Catalina
10.15.7
macOS Mojave
10.14.6
macOS High Sierra
10.13.6
macOS Sierra
10.12.6
OS X El Capitan
10.11.6
OS X Yosemite
10.10.5
OS X Mavericks
10.9.5
OS X Mountain Lion
10.8.5
OS X Lion
10.7.5
Mac OS X Snow Leopard
10.6.8
Mac OS X Leopard
10.5.8
Mac OS X Tiger
10.4.11
Mac OS X Panther
10.3.9
Mac OS X Jaguar
10.2.8
Mac OS X Puma
10.1.5
Mac OS X Cheetah
10.0.4
How to install macOSIf your Mac is compatible with the macOS that you want to install, you can install it:
Find out whether your Mac is compatible with the latest versions of macOS:
Published Date: May 12, 2025
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