Workaround:
Install 3CX Phone Client for Mac V15, start a call. Then you will be asked if 3cx is allowed to use your microphone. Then update the Client.
We had the same problem last week and reported it to 3cx.
http://downloads-global.3cx.com/downloads/3CXPhoneForMac15.dmg
That worked for me. Thank you!We also had the problem on Macbook Air Mid 2013.
Workaround:
Install 3CX Phone Client for Mac V15, start a call. Then you will be asked if 3cx is allowed to use your microphone. Then update the Client.
We had the same problem last week and reported it to 3cx.
http://downloads-global.3cx.com/downloads/3CXPhoneForMac15.dmg
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.