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MacBook Pro MC700LL/A Apple Core i5 2.3 GHz Specs (Early 2011 13", MacBookPro8,1 - A1278 (EMC 2419)) - Techable
SOLVED: How much RAM can I install in my laptop? - MacBook Unibody Model A1278 - iFixit
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MacBook Pro (Retina, 13-inch, Early 2015) - Technical Specifications