SOLVED: Can I insert 16Gb RAM into MacBook Pro early 2011? - MacBook Pro 13" Unibody Early 2011 - iFixit
Macbook PRO 13-inch A1278, Early 2011, 500GB SSD, 16GB RAM, OSX High Sierra | eBay
SHELI 8GB 16GB 2x 8GB 1333 MHz Late 2011 Early 2011 MacBook Pro A1286 MD322LL/A Memory RAM - AliExpress Computer & Office
Adamanta 16GB (2x8GB) Apple Memory Upgrade DDR3L 1600MHz SODIMM Compatible for iMac (Mid 2011, Late 2012, Early/Late 2013, Late 2014, Mid 2015), MacBook Pro (Early/Late 2011, Mid 2012), Mac Mini at Amazon.com
Apple MacBook Pro (13”, Early 2011) Intel i7 16GB RAM 256GB SSD for Sale in Orlando, FL - OfferUp
Amazon.com: Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3L 1600MHz for Mac Book Pro(Early/Late 2011,Mid 2012), iMac(Mid 2011,Late 2012,Early/Late 2013,Late 2014,Mid 2015), Mac Mini(Mid 2011,Late 2012) MAC RAM : Electronics
Apple Macbook Pro 13 inch Early 2011 2.3 GHz Intel Core i5 16GB RAM 500GB SSD | eBay