I posted how I did it on my blog: https://www.jeffgeerling.com/blog/2017/fixing-2011-macbook-pro-booting-grey-screen-amd-radeon-video-glitch https://www.jeffgee

I posted how I did it on my blog: https://www.jeffgeerling.com/blog/2017/fixing-2011-macbook-pro-booting-grey-screen-amd-radeon-video-glitch https://www.jeffgeerling.com/blog/2017/fixing-2011-macbook-p... Might still be worth doing for someone into older computers, I've considered putting a few of my old computers on the free pile at a VCF!