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how do i upgrade my Mac OS on my MacBook Pro

I have MacBook Pro with Mac OS 10.6.8. I want to install iBook Author software but when I try to install, I get error message stating that I need Mac OS X 10.7.4 or later to able to install this application. There seem to be no software updates available from menu. Could anyone tell me how I can obtain Mac OS X 10.7.4 or later? Thank you.

MacBook Pro, Mac OS X (10.6.8)

Posted on Jan 5, 2013 4:23 PM

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how do i upgrade my Mac OS on my MacBook Pro

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