That's not a throw a QB can comfortably make if they are fundamentally physically limited (like some suggest Mac is).
Mac's issues seem to be related to mechanical habits, weight balance/transfer, and the like. Too often he gets a bit jumpy in the pocket, gets too wide of a stance, allows his weight to shift too far back, to his rear-foot, which results in him pushing the ball rather than snapping it with the wrist, and throwing off the back foot. He needs to keep his feet set a bit closer together, relax, keep his eyes up.
He's not physically special but he's more than adequate. He needs to translate the practice/coaching with Tom House working on efficient mechanics, and integrate it to the point that he can execute it during games unconsciously.
Still a lot of time to get it right and it's all solvable. Let's see if Mac can do it.