Crucial - DDR3 - Module - 8 GB - SO-DIMM 204-pin - 1333 MHz / PC3-10600 - CL9 - 1.35 / 1.5 V - Unbuffered - Non-ECC - For Apple IMac 27" (Late 2012, Late 2013); IMac With Retina 5K Display (Late 2014, Mid 2015); Mac Mini (Late 2012); MacBook Pro (Mid 2012) - CT8G3S1339M