OWC 4GB PC12800 DDR3L 1600MHz SO-DIMM Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S4GB) at Amazon.com
Amazon.com: Kingston Technology 8 GB Kit (2 x 4 GB módulos) 1333 MHz DDR3 SODIMM Memoria para portátil de Apple iMac y MacBook Pro de Select kta-mb1333 K2/8G : Electrónica
Samsung 4GB DDR3 PC3-12800 1600MHz 204-Pin SODIMM Laptop Memory Module RAM. Model M471B5273DH0-CK0 at Amazon.com