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Helpful answers
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Feb 12, 2015 3:58 PM in response to geoff1952by Allan Eckert,Open the App Store and search for Yosemite.
Download and install it.
Backup your data first.
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Feb 12, 2015 3:58 PM in response to geoff1952by Niel,Back up your data, check your applications for compatibility, and try downloading Yosemite from the Mac App Store. If you get told that it’s incompatible, your Mac can’t be upgraded past 10.7.5.
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