Hello, I tried many times to completely disable it didn't work. I was looking for an efi solution. I'm working all day on the battery and because of the Radeon Pro 450, I'm currently recharging my macbook pro 15 2016 3 times a day. I never encounter such a dispute with Apple. Apple care erased my whole computer and it changed nothing. My battery life is awful (less than 3-4 hours). I regret a lot my purchase because of this issue. I'm only using photoshop and Chrome. I just need a 15 inch laptop with a 8-10 hours battery, but it doesn't seems to exist anymore.