One of the GUI Enhancements added with Band-in-a-Box 2015 for Mac was to the Drop Station.
Now a folder opens after copying to drop box, Drag Drop or another folder.

We've made a short (7:23) video showing how to use Drag-and-Drop in Band-in-a-Box 2015 for Mac, here.

There are even more video resources available that touch on the Drag-and-Drop feature!
Band-in-a-Box for Mac - Exporting songs to DAWs
Drag-and-Drop with Band-in-a-Box!