Arduino IDE is not showing any port macOS
My Arduino Uno is plugged in with mac USB port. But Arduino IDE is not showing any port. (macOS- Catalina)
To add to Nikhil Borle's answer, if you check the USB Devices in the System Report and don't see anything, you may have a cable problem. I didn't see my device, and found out that the USB Type-B cable wasn't fully plugged in to my Arduino! (It has been a very long time since I've used Type-B). Apparently it's possible to plug it in halfway and it will still receive power, but won't be able to communicate...
Once I fixed that, I closed & reopened System Information and it showed up as simply "Communication Device", although when I selected that, under the details, "Manufacturer" was listed as "Arduino (www.arduino.cc)" (I've got an Arduino Uno R3).
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