Problems with PA + OS X

Hi Guys,
I loaded today Puzzle Agent for the Mac and I got a lot of problems.
In the game are NO menus, NO dialogs and NO fonts. So it's completely unplayable.
Then I loaded PA for the PC and everything worked.
So ... does anyone else have the same problem, or maybe a solution?

Sincerely,
Hammerhead

P.S:
Sorry for my bad english, it's not my native language.

Edit:
I'm using a MacBook Pro 5.5 with OS X 10.6.4
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