SOLVED: Can I insert 16Gb RAM into MacBook Pro early 2011? - MacBook Pro 13" Unibody Early 2011 - iFixit
upgrade - Can I use 16GB DDR3-1600MHz RAM in an early Macbook Pro 8.2? - Ask Different
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