I'm running a 10.14 Mojave guest on a 10.15 Catalina host, using Virtualbox 6.1.10.
Like many others, I'm having a problem with no audio output from the OS X guest. I've enabled the audio input and output, but there's just no devices visible to the guest to get/send audio from/to.
I was wondering if a driver or kext from the Multibeast package might be helpful here? Has anyone tried? tonymacx86 dot com