Find out which macOS your Mac is using
Use About This Mac to see the version of Mac operating system installed on your Mac, and find out whether it's the latest version.

Is your Mac up to date with the latest version of the Mac operating system (macOS or OS X)? Is it using the version required by some product or feature? Which versions are earlier (older) or later (more recent) than the version currently installed? To find out, learn which version is installed now.

If your macOS isn't up to date, you may be able to update to a later version.

Which macOS version is installed?
From the Apple menu  in the corner of your screen, choose About This Mac. You'll see the macOS name, such as macOS Mojave, followed by its version number. If some product or feature requires you to know the build number as well, click the version number to see it.



This example shows macOS Mojave version 10.14 build 18A391.

Which macOS version is the latest?
These are all Mac operating systems, starting with the most recent. When a major new macOS is released, it gets a new name, such as macOS Mojave. And as updates that change the macOS version number become available, this article is updated to show the latest version.

If your Mac is using an earlier version, you should install the latest Apple software updates, which can include important security updates and updates for the apps installed by macOS, such as Safari, iTunes, Books, Messages, Mail, Calendar, and Photos.

macOS	Latest version
macOS Mojave	10.14.5
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
Learn more
Always use the macOS that came with your Mac, or a compatible newer version.
Learn how to reinstall macOS from macOS Recovery.
Published Date: May 13, 2019