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Which version of Mac OS X do I have?

When downloading and installing screensavers and other software programs, it is often useful to know which version of the Mac OS X (or macOS) operating system is installed onto your computer. Sometimes, software applications depend on a specific version of an operating system, and consequently may not function on newer or older versions.


Finding your version number

To determine your current version of Mac OS X, simply follow these few steps:

  1. Click on the Apple icon at the top left of your screen.
  2. Select "About This Mac".
  3. A new window will appear with some basic information about your Mac. At the top, just below the "Mac OS X" header, you should find your version of the Mac OS X operating system. Example: Mac OS X 10.6.8.
  4. For more detailed information, click "More Info", scroll down and select "Software".

If you prefer to use the Terminal, the following command will return your version number:

  • sw_vers -productVersion


All versions of Mac OS X also have a codename, such as "Snow Leopard," "Mountain Lion" or "Yosemite". Below is a list of codenames and their corresponding version number:

  • Version 10.12: Sierra (OS X was renamed to macOS)
  • Version 10.11: El Capitan
  • Version 10.10: Yosemite
  • Version 10.9: Mavericks
  • Version 10.8: Mountain Lion
  • Version 10.7: Lion
  • Version 10.6: Snow Leopard
  • Version 10.5: Leopard
  • Version 10.4: Tiger
  • Version 10.3: Panther
  • Version 10.2: Jaguar
  • Version 10.1: Puma
  • Version 10.0: Cheetah

Hopefully, knowing your version number and its codename will help you determine which software programs, including screensavers, are likely to work on your computer.

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