Timetec Hynix IC Apple 16GB Kit (2x8GB) DDR3 1600MHz PC3-12800 SODIMM Memory upgrade For MacBook Pro13-inch/15-inch Mid 2012, iMac 21.5-inch Late 2012/ Early/Late 2013, 27-inch Late 2012/2013, Retina 5K display Late 2014/ Mid 2015, Mac Mini Late 2012/Server (16GB Kit (2x8GB))