I only need to use Rhino for converting Illustrator files into lines & arcs for CNC purposes. Does Rhino 5.0 version have the same capabilities of 5.3 for doing that? Also, does 5.0 have BoxEdit?
Not quite sure of your question - are you trying to compare Rhino for Windows 5.0 with Rhino for Mac 5.3?
I think this should be OK, if all you need is the _Convert command and .ai export from Mac.
5.0 for Windows yes, 5.3 for Mac yes as well.