Hi Brian, that may be possible but also a little complex because the obj23dm utility is a Windows command-line program and the operating system being used in this case is the Mac...

But yeah that could be another possibility with using Wineskin or CrossOver to run it.

Again though, it's not just a matter of converting from one kind of packaging format to another, CAD programs do not really expect to receive data in IGES files where objects are formed of hundreds of thousands of little tiny triangle facets so if that's what the original file contains it may just not be suitable for conversion without some complex kind of surface reconstruction and reverse engineering step.

- Michael