My buddy just bought a 2009 Mac Pro and did some kind of firmware update that allowed him to add bigger sticks of ram and faster ram as well. Basically, it brought it up to equivalent of 2013 or something like that. I can get exact info from him if needed. Here is my question. I own a high end iMac (2017) and MacBook Pro Retina (Early 2013) but I would like to buy an older MacBook Pro if I can do some kind of firmware update that would allow me to add bigger sticks of ram and faster ram. So, can this be done? If so, what year is the best option and what will it allow me to upgrade to? Thanks everyone!