I am at a loss for how to even troubleshoot this from here, would really appreciate any help. VBoxDarwinAdditions.pkg and rebooted but no change. I installed the Mac OS X Guest Additions i.e. In the VirtualBox Audio settings I have two choices for driver "CoreAudio" and "Null Audio Driver", I have tried them both. However I am left with a VM that has no audio support, I see "No output devices found" in Audio preferences. These instructions are a few years old so I am guessing something has changed in the Mac boot process. After installing the OS from the ISO, I was able to reboot into the OS, shut down, unmount the ISO, and start back up, and have what looks like a fully functional VM running High Sierra. However my installation process didn't follow the script, I never got dropped to the EFI prompt. I created the ISO image using the InstallerApp2ISO.sh script mentioned in topic 81443 (sorry I can't post links yet) and followed the instructions mentioned in topic 85631. I imagine that this is a very common request because a lot of people are frustrated that they can no longer run their 32 bit apps once they upgrade to Catalina, and it isn't easy to downgrade. I am not too picky about which version I install, I picked High Sierra just because it is the most recent version in the pull-down in VirtualBox when creating a new VM. I wish to install an older version of Mac OS in a VirtualBox so that I can run some 32 bit apps since Apple eliminated support for them in Catalina. I have a MacBook Pro running Mac OS X Catalina 10.15.3. For what it's worth I have the same issue with VirtualBox 6.1.8.
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