Turn NMSVE on via the switch on the backside of the device.
The green LED will illuminateprompting you to select a channel by pressing the corresponding button (button1 = channel 1, button 2 = channel 2, etc...).
NMSVE should now be flashing its blue connect LED - meaning that it is searching for a device to connect to (once connected the LED will go solid).
Open Audio MIDI Setup on your Mac via Applications > Utilities > Audio MIDI Setup.
From the Taskbar choose Window > Show MIDI Studio
From the MIDI Studio Taskbar choose MIDI Studio > Open Bluetooth Configuration
From this window find NMSVE from the discoverable devices section and press connect.
Open the application you'd like to use NMSVE with - NMSVE should now function as a regular MIDI device.
Choosing a selection results in a full page refresh.