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OSX- How to determine your Operating System Version

  1. Click on Apple.
  2. Click on About This Mac.
  3. About This Mac window should appear.
  4. Information about Operating System, Processor, and Memory is displayed in this window.

System Profile Utility

Information found in the system profile utility: Hardware, Software, Network, and Serial number

Activation Steps:

  1. Choose About This Mac from Apple menu. (If you double click the version number it will display the serial number, with OS 10.1 or later)

  2. Click More Info... button on About This Mac dialog box
  3. Along with all the other information listed here you will find your serial number