HT201260: Find the OS X version and build number on your Mac
Learn about Find the OS X version and build number on your Mac
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Helpful answers
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May 14, 2013 5:49 PM in response to BrooksP35by Niel,1. Leopard.
2. Click here and read all three steps to the bottom.
3. Use a program such as Time Machine, Carbon Copy Cloner, SuperDuper, or the Disk Utility to back up to an external drive.
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May 14, 2013 5:51 PM in response to BrooksP35by Ralph Landry1,You have to go to the Apple on-line store and order Snow Leopard, 10.6, install and on-line software update to 10.6.8. Then if you meet the requirements in http://www.apple.com/osx/specs you can go to the Mac App Store and for $20 download Mountain Lion 10.8.3. Snow Leopard is also $20.