No! The 2012 MacBook Pro ‘‘Retina’’ cannot upgrade the RAM to 16 GB after purchase, You actually can’t upgrade the RAM at all. However in older unibody MacBook Pro's many people have doubled the claimed maximum amount. Simply because Apple says 8 GB is the maximum amount doesn’t make it true, I have 16 GB in my (Mid 2012 13" MacBook Pro) and Apple says the maximum RAM is 8 GB so take what they say with a grain of salt. The Life expectance of the Retina models are 2 years, Apple is selling out what used to be a company that was dedicated to the users is now only worried about profit and made many if not all of the past models upgradeable parts now non upgradeable in the newer models. (i.e MacBook Pro Retinas and MacBook Air's) They have now started glueing the Retina models battery to the case with an abundant amount of glue and they are non replaceable with a life expectancy of 1K charge cycles. Well, you ask what does that mean? It means the average persons MacBook Pro Retina will only last 2 years (and...