Is your Mac up to date with the latest version of the Mac operating system? Is it using the version required by some product that you want to use with your Mac? Which versions are earlier (older) or later (newer, more recent)? To find out, learn which version is installed now.

• Upgrade Mountain Lion To Mavericks
• Upgrade Mac Os X Lion To Mavericks
• Upgrade Mountain Lion To Mavericks

We encourage all users on these operating systems to upgrade to newer versions of macOS in order to have ongoing access to the latest features of Steam, and to ensure future access to all games and other Steam content. Users of macOS versions 10.7 ('Lion') through 10.10 ('Yosemite') can find more information on upgrading macOS here.

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. OS X 10.9 Mavericks supersedes OS X 10.8 Mountain Lion and is the first version of OS X to be free. Although it doesn't introduce any revolutionary changes to OS X, it includes some nice features, especially for fans of iOS, Maps and iBooks.

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 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.

Which macOS version is the latest?

Upgrade Mountain Lion To Mavericks

Upgrade Mac Os X Lion To Mavericks

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 Big Sur. As updates that change the macOS version number become available, this article is updated to show the latest version of that macOS.

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

Upgrade Mountain Lion To Mavericks