Running bootcamp also on my MBP with AMD Radeon 460 gfx card. Then, to my stupidity I bought Ghost Recon Wildlands today - thinking surely they can't make the same mistake on a completely different game? Wrong - GRW does exactly the same as FH - gets to the splash screen, it vanishes, then the process quits, no errors. So I got For Honor a while back via steam, could not for the life of me get it to work after hours and hours trying to fix it.
