Hi, I bought a core to my macbook pro 15" It works like a charm! But one game make everything a mess, why? When i start Call of Dury : Modern Warfare remastered. The core disconnects the USB and lightning inside the core.. You still have a picture, and the graphic-cards lighning is on.. but when you play the game it´s extreamly laggy. This is the ONLY game that does this.. The screen works while this happens that are connected to the core. But as i siad the game are extremly laggy.