This app was removed from the App Store.
Mac OS Productivity
* * * WAIT! January 31, 2014 Update! * * *
Autodesk has discontinued their online DWF translator, called Freewheel, that this app used for years to show DWFs in all their glory to Mac users around the world. Because of this, McDwiff no longer works.
There's a chance Autodesk will re-open Freewheel, but it's not likely. So your best best is to not buy this app until we get an update from Autodesk!
Austin Silver Software
* * * END of Update * * *
McDwiff is a Mac OS X application that opens, views, converts, and prints DWF and DWFx files (McDwiff doesn't open DWG or DXF files! For those, use AutoCAD for Mac.)
McDwiff is also available for iPad.
McDwiff connects to Autodesk's online DWF translator, so accuracy is always 100%. Of course this means your DWF is being uploaded to Autodesk servers, so don't use McDwiff unless you're OK with that. It's all private and stuff, but you never know.
Open any DWF (2D or 3D) on your Mac, just like any other file type. 3D files open, but 3D rotation is still "in the oven", so to speak.
Fast zooming and panning - McDwiff uses predictive image processing, supports multipage DWF files, lets you print DWFs, and can export DWF to TIF, GIF, JPG, PNG, BMP, or PDF.
McDwiff requires Mac OS X 10.6 or later.
Now with AppleScript support for batch converting/exporting DWFs to image formats (JPG, PNG, etc.)