port not detected

please help i used mac os mojave 10,14. the problem cannot detect the port or no port deteded thnaks

Make sure the USB cable is completely plugged into both the Arduino board and the PC.

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

Hi,
I have the same problem. Tried different cables and 3 different computers. It is an original Arduino UNO.