1️⃣ Click on “System Preferences”, choose “Sound”, and go into the “Input” setting. Make sure to select the USB PnP Audio Device as the device for sound input.
2️⃣ You can adjust the input volume to 50%-70%. The same goes for the output volume of the speaker.
3️⃣ Then you can test your mic in recording software like the QuickTime Player:
Open “New Audio Recording” in “File” and select the “USB PnP Audio Device” as the input device. Adjust the volume level when recording.
You can refer to the video from 0:39-1:40