As a guy who has a 2011 MacBook Pro, try writing Haiku to disk from a PC with an Intel (MBR) partition map and put it in the Mac from there. That may help solve some of your problems.
Please note, however, that while Haiku can run on it, keyboard and screen brightness, AirPort, and sound will not work out of the box (or at least not on my model). Your resolution options will also be limited.