Chosen Solution
Found out cant change or upgrade RAM for my macbook pro but, would it be possible to upgrade RAM if I replace tha logic board?
Sure you can, just stick to your series of Macbook for compatibility (Macbook Pro 11,1), but although somewhat rarer and quite expensive you could find up to i7 boards with 16GB RAM onboard. Just choose between tabs the desired processor speed and Ram. MacBook Pro 13" Retina (Late 2013) 2.6 GHz Logic Board