"Can RAM be upgraded?"に関する回答no for finality anything later than 2012 for 13' mac book pros are soldered as apple upgraded other parts that were bigger, so they had to lower space. they took out the push-slot in ram compartment, and just soldered onto board. so if you want to upgrade you will have to probably order a new motherboard with new ram on. unless you have crazy good soldering skills otherwise it will just screw up the system and even if you could do that it would be hard to find compatible ram thats not ripped out of another mac for quadruple the price. so in conclusion if your going to do it your going to have to pay a lot and (to do safely) let apple do it.