2GB Memory (PC3-12800, DDR3 1600MHz) for Apple MacBook Pro 15 inch A1286 Mid 2012. iMac 21.5 inch A1418 Late 2012, A1418 MacMini A1347 - Late 2012
4GB Ram Memory (PC3L-12800, DDR3 1600MHz) for Apple MacBook Pro 15 inch A1286 Mid 2012. Apple MacBook Pro 13 inch A1278 - Mid 2012. iMac 21.5 inch A1418 Late 2012, A1418 Early 2013, A1 - MacBook Parts South Africa
Mid-2012 MacBook Pro Unibody RAM Upgrade - YouTube
A-Tech 8GB Kit (2x4GB) RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
upgrade - 32gb of RAM on a 2011 or 2012 15/17-inch MacBook Pro using Crucial's 16gb single DIMMs - Ask Different