Description: SO-DIMM DDR3 PC12800 1600Mhz 4Gb x2 = total 8Gb (2x SO-DIMMs) Note: Sample image only Model: Suit MacBook Intel Core i5 and i7 from 2011 onwards in 2/2.2/2.3/2.4/2.5/2.6/2.7/2.8/2.9 in 13" and 15" and 17" Unibody models (does not suit any Retina models in both 13" and 15") Note: Suits other models (to be updated) Part number(s): PAMESOD3G816