Installing Guest Additions on Catalina 10.15.5

[alangh]

Using VirtualBox 6.1.10 r138449 (Qt5.6.3) on a host retina iMac 2019 running Mojave 10.14.6.
The extension pack is installed. I have a VM client with Catalina 10.15.5 installed.
When I try to install Guest Additions in the client, the installer comes up, gets the authorization
password, and tries to install but returns with an error (contact the developer).
I have attached a zipped install log (search it for VBox near the end).
From looking at the log, this appears to be a kext issue. Are there any work arounds?

[paulson]

Someone figured out how to get the GAs installed in a Catalina guest
and described the steps in the following ticket:

https://www.virtualbox.org/ticket/19047#comment:6

But the reports are that the functionality is still not available
afterwards. The VirtualBox manual does state that MacOS X guests are
classified as an "experimental feature":

https://www.virtualbox.org/manual/ch14. ... alFeatures

So probably have to wait further for Catalina GAs functionality.