Check the Version Number of Your Operating System in Mac

This page provides instructions for checking which operating system you have on your Mac (Mavericks, Mountain Lion, Lion, etc.).


Open "About This Mac"

Open "About This Mac"
  1. Click on the Apple icon in the top-left corner of your screen to reveal a drop-down menu.
  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




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