Serial Port Greyed out on MAC

I am working with an Adafruit Circuit Playground Classic on a MAC Book Pro OS High Sierra 10.13.6

I cannot upload my code and keep getting and error saying:

"The selected serial port does not exist"

There is only one serial port option and that seems to be Bluetooth (attached)

Is there a simple solution for this please? -Anyone!

Make sure the USB cable is fully inserted into the USB jacks on your Circuit Playground and computer.

You may have a damaged, defective, or charge only USB cable. Try a different cable.

Thanks for your reply. I know that it is not the cable - I purchased a new good quality sync cable and tried it today - I am still not able to see a serial port.