mac - What is the maximum RAM size for MacBook Pro Mid 2012? - Ask Different
A-Tech 4GB RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz SODIMM PC3-12800 204-Pin SO-DIMM Memory Upgrade at Amazon.com
recommended ram for mid-2012 macbook pro - Apple Community
Memory RAM Upgrades for MacBook Pro (2012 - Late 2016)