Go to the "Mappers" tab if you are connecting hardware decks. Virtual DJ Pro 7 natively supports plug-and-play mapping for hundreds of classic MIDI and HID controllers.
Yes, Virtual DJ 7 was released for macOS as well. The installation process is identical: download the .dmg from your licenses page, drag it to Applications, and enter your serial number. Note that modern macOS versions (Catalina and later) may require you to approve the software in settings because VDJ7 is not notarized by Apple. how to download and install virtual dj pro 7 top