Find out which macOS your Mac is using

Use About This Mac to check the version of Mac operating system installed, and find out whether it's the latest (newest, most recent) version.

Which macOS version is installed?

From the Apple menu  in the corner of your screen, choose About This Mac. You should see the macOS name, such as macOS Big Sur, followed by its version number. If you need to know the build number as well, click the version number to see it.

About This Mac window


Which macOS version is the latest?

As updates that change the macOS version number become available, this article is updated to show the latest version of that macOS. To get a later version, install the latest Apple software updates.

macOS Latest version
macOS Big Sur 11.6
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
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