This guy is the one I’m struggling with. I’m playing on a Mac btw. I can get him weakened okay but then I see the kill symbol over his head - and from walkthroughs I’ve looked at I need to use a melee attack to finish him off. The problem is when I run over to him and press F (for melee) it still only lets me aim my weapons, not use them to attack melee style. Help? What am I doing wrong?