no sound in zoom -

[KJRL]

I can hear, but they can't hear me

I'm wondering if it is connected to the Mac upgrade yesterday?

[Jameswalter]

Check if the microphone, speakers, or headphones are plugged in and not muted. Unplug the device, then plug it back in. If it's a bluetooth device, ensure that it is turned on and connected properly. Make sure that you are using a supported USB device for Zoom.

Regards,
James