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Eg Lion, Leopard etc.

If I click the Apple symbol, then "About This Mac" I only get the version number…

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3 Answers 3

up vote 19 down vote accepted

Well the version number is the correct thing to report when you have issues etc.

The marketing names are from wikipedia

╔════════════════════════════╦════════════════════╗
║          Version           ║      Codename      ║
╠════════════════════════════╬════════════════════╣
║ Rhapsody Developer Release ║ Grail1Z4 / Titan1U ║
║ Mac OS X Server 1.0        ║ Hera               ║
║ Mac OS X Developer Preview ║                    ║
║ Public Beta                ║ Kodiak             ║
║ Mac OS X 10.0              ║ Cheetah            ║
║ Mac OS X 10.1              ║ Puma               ║
║ Mac OS X 10.2              ║ Jaguar             ║
║ Mac OS X 10.3              ║ Panther            ║
║ Mac OS X 10.4              ║ Tiger              ║
║ Mac OS X 10.5              ║ Leopard            ║
║ Mac OS X 10.6              ║ Snow Leopard       ║
║ Mac OS X 10.7              ║ Lion               ║
║ OS X 10.8                  ║ Mountain Lion      ║
║ OS X 10.9                  ║ Mavericks          ║
║ OS X 10.10                 ║ Yosemite           ║  
╚════════════════════════════╩════════════════════╝
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As of OS X 10.10 Yosemite, the name of the OS is listed in About This Mac.

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Click on the black Apple icon in the leftmost upper corner of your display when in Finder. Your Operating System is listed under the bold-faced "OS X"

Note: If you click on the icon reading "More Info" you will get all of the hardware info related to your Mac.

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The OP is doing what you suggest. The About This Mac screen only shows the OS X version number, not its name. –  Dan J Apr 17 '13 at 18:54

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