Mac users interested in Mcdwiff free version generally download:
McDwiff is an application that opens, views, converts, and prints DWF files.
It can open any DWF (2D or 3D) on your Mac just like any other file type and guarantees 100% accyracy. 3D files open, but 3D rotation is not possible yet. McDwiff allows fast zooming and panning, supports multipage DWF files, lets you print DWFs, and can export DWF to TIF, GIF, JPG, PNG, BMP, or PDF.