HT1651: MacBook: How to remove or install memory
Learn about MacBook: How to remove or install memory
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Helpful answers
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Apr 19, 2015 7:22 PM in response to joseyakimaby Niel,Back up your data, check your applications for compatibility, and download Yosemite from the Mac App Store.
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Apr 19, 2015 8:20 PM in response to joseyakimaby kaz-k,Yosemite requires MacBook late2008 aluminum or later.