DN Map Loader
The 1.2 version of DN Map Loader for Mac is available as a free download on our website. DN Map Loader for Mac lies within Games, more precisely Tools.
From the developer:
DN Map Loader lets you easily use third party maps and total conversions with the OS X version of Duke Nukem 3D, including Duke It Out In DC.
You may want to check out more software for Mac, such as Xtreme Mapping, Memory-Map or Free Maps Ruler, which might be related to DN Map Loader.