A:Answer HI!, I have this SSD installed in a Mid 2012 MBP 13" Perfect fit, easy to replace!, will work at full speed!. Just be careful with the SSD connection on the MBP, they can be fragile. Boot up tome on my 2012 MBP 13" is under 14 secs from white apple logo to desktop!! And this is only i5/240GB SSD/16GB DDR3 ram. While you are in there, upgrade to 16GB ram, Catalina will be buttery smooth!