Check Version of Mac OS

This page provides instructions for checking which operating system you have on your Mac (El Capitan, Sierra, etc.).

Open "About This Mac"

Open "About This Mac"
  1. Click on the Apple icon in the top-left corner of your screen
  2. From the menu, select About This Mac

Your Version Number Is Listed Under "OS X"

Your Version Number Is Listed Under "OS X"
  • Snow Leopard is 10.6
  • Lion is 10.7
  • Mountain Lion is 10.8
  • Mavericks is 10.9
  • Yosemite is 10.10
  • El Capitan is 10.11
  • Sierra is 10.12

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