I’d assume it’s different in the 15” late 2013 machines, as I upgraded today without issue - although there was about a five minute interlude of a completely bl

I’d assume it’s different in the 15” late 2013 machines, as I upgraded today without issue - although there was about a five minute interlude of a completely black screen, during which I can only assume it was doing whatever it does to the IO board that bricks the 13” models.