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I created a virtualbox vm for macOS High Sierra on two host OSs, macOS Catalina (as explained at How can I install a macOS VM Guest under VirtualBox on a Mac host?) and Windows 10. In both cases the audio doesn't work. Audio is enabled in the VM settings but I can't hear any sound in the High Sierra guest. In the sound preferences in MacOS the "muted" checkbox -in the "audio output volume" section- is checked, and grayed out. Do you know if audio is expected to work in virtualbox when macOS is the guest OS?

s_federici
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  • For Catalina, make sure you're on VB 6.1.4, lots of people have been having issues since Catalina, but I don't have any detailed fixes as I use Parallels. macOS on Win host is off-topic here, however, as it's unlicensed. – Tetsujin Mar 07 '20 at 15:49
  • Yes, the VB version is 6.1.4.r136177. So, when creating the VM on Mjave the audio is supposed to be functional? – s_federici Mar 07 '20 at 19:49
  • Well, as the hardware is Apple, the drivers should already be present & correct. idk how VB goes about 'additions' for macOS, because none actually exist for VB officially. As it's unlicensed other than on a Mac it shouldn't be necessary, but I really am not certain how it works. As I say, I use Parallels which doesn't have these issues at all - their additions are fully licensed. VB's aren't. – Tetsujin Mar 08 '20 at 13:40
  • I recently set up a Mojave VM in virtualbox and I recall them insisting that you turn off audio support in vbox as it doesn't work. Just wish I remembered where I saw it... – Steve Chambers Mar 08 '20 at 23:47

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