How to connect to serial console via USB port in MacOS

You will need to open Terminal
Then run the command ls -la /dev/*usb* to list the available USB resources
It will look something like:

Helios-MacBook-Air:~ helio$ 
Helios-MacBook-Air:~ helio$  ls -la /dev/*usb*
crw-rw-rw-  1 root  wheel   18,  11  4 Dec 12:15 /dev/cu.usbserial-1420
crw-rw-rw-  1 root  wheel   18,  10  4 Dec 12:15 /dev/tty.usbserial-1420

Then to connect to the USB resource use the following command:
Helios-MacBook-Air:~ helio$ screen /dev/cu.usbserial-1420