When 1st time casting from vCastSender to IFP, MacOS will pop-up a message to ask for audio authorization for "vCastSender". Please choose “Agree” or there will be no sound when casting.
To manually allow access, go to:
1. System Preferences > Security & Privacy.
2. Select the Privacy panel.
3. Ensure that "vCastSender" is checked under Microphone.
NOTE: Ensure both MacOS and IFP are not muted.
