Long story short, I have a 15" 2012 2.6ghz 16gb RAM and it was water damaged so I bought a BRAND NEW board for it which is a 2.7ghz with 16GB of RAM, just curious, nothing ever shows up for the model ID, like MID 2012 or 2013 whatever, and is there a way I can enter a serial number into "about this Mac", any help would be appreciated.