Need Nano firmware to HBOT cnc for a MacBook

Hi! I am trying to connect a HBOT Laser Engraver to my Mac and I can't seem to connect the Arduino Nano to it and set up the usb COM port.

Can you help me please?

I can't seem to connect the Arduino Nano to it

To what? The Mac? Or the engraver?

What is the Arduino going to do?