Applies to macOS 10.14 Mojave and later. If you have issues using Mac built-in camera or microphone, please follow the instructions below.
1. Make sure that access to Mac camera and microphone is allowed for Parallels Desktop. Open macOS System Preferences > Security & Privacy > put a checkmark next to 'Parallels Desktop' under Camera and Microphone sections:
Note: after you allowed access to camera or microphone, make sure to quit and restart Parallels Desktop.
2. Go to Windows virtual machine's configuration > Hardware > Sound & Camera > make sure that microphone is not muted and 'Share Mac camera with Windows' is checked:
3. Check the camera or microphone now If camera or microphone do not work yet, reinstall Parallels Tools and check application settings that uses camera microphone.