How to see what version of OS X your Mac is running.

As technology and software advance, some newer apps and devices won't work with older versions of OS X. Not sure what version of OS X you're running? Here's how to find out:

How to see what version of OS X your Mac is running

  1. Click on the Apple logo in the top left corner of your screen. It should look like this .
  2. Click on About This Mac.

    Click on the Apple logo in the top left corner and then click on about this mac.

As you can see in the picture below, you will see the name of the OS X version right at the top, and under that will be the version number. In this case, you can see the Mac is running OS X El Capitan version 10.11.5.

About this mac menu.

The tabs across the top will provide you with additional information about your Mac's display and attached displays, storage, and support and service. Additionally, the "System Report…" button at the bottom will open the System Information app with detailed information about all of your Mac's hardware and software bits, while "Software Update…" will open the Mac App Store and check for available updates to OS X.

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