Reading WAD files (La-Mulana)

I've tried running this game but when I get to the actual game, the main screen goes black and all I can see are the health and item bars on the top of the screen. Anyone have a fix around this?

Operating System:
OSX

Processor/CPU:
Intel i7

Video Card/GPU:
amd radeon hd 6750m

Memory/RAM:
4 GB

Dolphin Revision Currently Using:
4.0.0

I really would love to play this game on the computer. Any suggestions / ways to play this would be greatly appreciated.

- Zorg