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
Corsair Apple Certified 16 GB (2x8 GB) DDR3 1600MHz (PC3 12800) Laptop Memory 1.35V at Amazon.com
4GB PC3-12800 1600MHZ DDR3 240PIN DIMM ECC DR X8 VLP REG CL11 at Amazon.com
Addon 16Gb Ddr3-1600Mhz 204-Pin Sodimm at Amazon.com