University of Oregon

How to Know Which Version of macOS/Mac OS X You Have


Finding the Version of macOS/Mac OS X You Are Running

Knowing what software you're running on your computer is necessary for many different things, such as purchasing the correct software for your computer, updating your software, etc. This article explains how to find out exactly what version of Mac OS X you have on your computer.


  1. In the menu bar, click on the Apple logo.
  2. Select About This Mac. A window will appear.
  3. Your version of macOS/OS X will be displayed below the letters OS X or macOS <version name>.
  4. It should say Version 10.*.


Code Names

Apple uses code names during development and marketing as a way to refer to different versions of macOS/OS X. Those code names have become a popular way to refer to a version of macOS/OS X. Below is a list of all the current versions of macOS/OS X and their associated names.

  • 10.0   Cheetah
  • 10.1   Puma
  • 10.2   Jaguar
  • 10.3   Panther
  • 10.4   Tiger
  • 10.5   Leopard
  • 10.6   Snow Leopard
  • 10.7   Lion
  • 10.8   Mountain Lion
  • 10.9   Mavericks
  • 10.10 Yosemite
  • 10.11 El Capitan
  • 10.12 Sierra