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How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
MacBook Pro: How to remove or install memory - Apple Support
Best Buy: Apple MacBook Pro 13.3-inch 500GB Intel Core i5 Dual-Core Laptop (MD101LL/A) Mid-2012 Pre-Owned Silver A1278
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16GB 2 x 8GB Memory RAM for iMac Late 2012 MacBook Pro Mid 2012 A1418 MD094LL/A 5053772959125 | eBay
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