Aporte original por: sedrehman ,
everything is possible my man. all you need is the same kind of ram macbook pro retina has (size and speed) and a guide on how to place em in the motherboard (which is the problem). And the stuffs are all glued in. So pulling out stuff to get to the ram is difficult. But do remember you have super ssd and lot faster ram speed to get you through long time to come. Believe me man i went with a 8 gb model of 2015 macbook pro retina 13 myself.