, today’s topic is about how to easily check what version of macOS your Mac computer is running. Knowing the version of macOS that is installed on your computer is important, as it helps you to stay up to date with the latest features and security patches. So, let’s get started and explore the different ways to check your Mac’s operating system version.


Knowing what version of Mac OS you are running is important for many reasons. Some applications and software require a specific version of Mac OS, and it’s always a good idea to keep your operating system up to date to ensure maximum functionality and security. In this article, we will show you how to determine which version of Mac OS you are running.

Checking the Version Number

The easiest way to check which version of Mac OS you are running is to click on the Apple menu icon in the top left corner of your screen and then click on “About This Mac.” This will open a window that displays the version number of your Mac OS.

Understanding the Version Number

The version number of your Mac OS can be a little confusing at first, but it’s actually quite simple once you understand how it works. The version number is made up of three components: the major version number, the minor version number, and the revision number.

The major version number indicates a significant change to the operating system. For example, when Apple released Mac OS X, it was a major change from the previous version, Mac OS 9. The minor version number indicates smaller updates and improvements to the operating system, while the revision number indicates bug fixes and other minor changes.

Common Mac OS Version Numbers

Here are some of the most common Mac OS version numbers and what they correspond to:

  • Mac OS X 10.0: Cheetah
  • Mac OS X 10.1: Puma
  • Mac OS X 10.2: Jaguar
  • Mac OS X 10.3: Panther
  • Mac OS X 10.4: Tiger
  • Mac OS X 10.5: Leopard
  • Mac OS X 10.6: Snow Leopard
  • OS X 10.7: Lion
  • OS X 10.8: Mountain Lion
  • OS X 10.9: Mavericks
  • OS X 10.10: Yosemite
  • OS X 10.11: El Capitan
  • macOS 10.12: Sierra
  • macOS 10.13: High Sierra
  • macOS 10.14: Mojave
  • macOS 10.15: Catalina

Checking for Updates

Once you know which version of Mac OS you are running, it’s a good idea to check for any available updates. To do this, click on the Apple menu icon and then click on “System Preferences.” From there, click on “Software Update.” If there are any updates available, you will be prompted to download and install them.

Checking Compatibility

When installing new software or applications on your Mac, it’s important to make sure that they are compatible with your version of Mac OS. Some applications may require a specific version of Mac OS or may not work at all on older versions.

To check the compatibility of an application, you can usually find the system requirements listed on the application’s website or in the documentation that comes with the application. If you are unsure whether an application is compatible with your version of Mac OS, you can contact the developer or manufacturer for more information.

Upgrading Your Mac OS

If you are running an older version of Mac OS and want to upgrade to a newer version, you can do so by downloading the latest version of Mac OS from the Mac App Store. Before upgrading, it’s important to back up your important files and data to ensure that they are not lost during the upgrade process.

It’s also a good idea to check the system requirements for the new version of Mac OS to make sure that your Mac is compatible. Some older Macs may not be able to run the latest version of Mac OS.

FAQs for How to Tell What Version of Mac OS You Have

How can I find out what version of Mac OS my Mac is running?

To check what version of Mac OS you have, you can go to the Apple menu at the top left corner of your screen and select “About This Mac.” You will see a window that shows the name of your Mac operating system, such as “macOS Catalina” or “macOS Big Sur”, along with the version number. For example, if you are running macOS Catalina, the version number will be 10.15.

Is there a faster way to check my Mac OS version?

Yes, there is. You can use the keyboard shortcut “Command + Space” to launch Spotlight, and then type “About This Mac” in the search bar. Click on the “About This Mac” result to see the same window that displays your Mac operating system and version number.

Can I find out the build number of my Mac OS version?

Yes, you can. To view the build number of your Mac OS version, click on the version number in the “About This Mac” window. You will see a string of letters and numbers that represent the build number. This information may be useful if you need to check if a certain bug fix or security update has been installed on your Mac.

How do I know if my Mac can run the latest version of Mac OS?

Apple provides a list of Mac models that are compatible with each version of Mac OS. You can check if your Mac is eligible for a particular OS upgrade by going to the Apple website and looking for the system requirements for that version. Keep in mind that older Mac models may not be able to run the latest version of Mac OS due to hardware limitations.

Can I upgrade my Mac OS without losing my files?

Yes, you can upgrade your Mac OS without losing your files. Apple provides a seamless upgrade process that will keep all your personal files and applications intact. However, it is recommended that you back up your data before upgrading, just in case something goes wrong during the installation process. This can be done using Time Machine or another backup solution.

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