I have been working with the developer to bring this sweet plugin to the Mac.
Trace transforms raster images into vector graphics within Rhino 6.
The output is has been clean and accurate. We use it all the time in our cnc work.
Plugin works on bitmaps, jpeg, png files. Black and white are the best.
Install the plug-in and run the Trace command. The trace menu will show up in the upper left corner of your screen.
The plugin is free over at https://www.food4rhino.com/app/trace
A big thank you to the developer for letting me help him with this.
Having this plugin available on the Mac is a big deal for us. so I thought some other Mac users would appreciate knowing that it is available.