This needs a 2 step procedure:
Start Warband, but DON't start Perisno yet
configure: video options: check "Load Textures on Demand"
failing to do that caused the crash.
The second issue however is all the fonts don't display on mac, so you don't see any progress, menus, or choices, and stumble around blindly.
The fix for that is a little more subtle:
go into the folder Modules under Mount & Blade Warband
Now find the Perisno_0.73 folder
go to Data
delete FONT_DATA.XML and "New Folder" with FONT.DDS and FONT_DATA.XML
this blows away the Perisno font and forces you to use default font for Warband, so you can at least see the menus.
That SHOULD get you going, although I don't have a Mac and don't really feel like buying another PC (I have 5 already). Some think that gets them going.
- GS