I have found that these models will crash OSX users as soon as they are spawned, and any server with them spawned before joining will result in a crash upon entering.
I have tested this on three computers running OSX, two different macbook's, and a desktop. If you know any other OSX users who have these problems please have them reply to this. I'm running OS 10.9.3 using a MacBook Pro 17' with retina display connected to. Now this is only with fullscreen apps but I think it might be the same problem.
