What happens in the guest is this : there is indeed a `/media/sf_downloads` directory present as it should, but Code: Select all Expand view Collapse view ls /media/sf_downloads returns an empty result, when there are actually several files in the host `Downloads` directory. Select 'Show Log' and save 'VBox.log' (no other file) to a zip file. Make sure the VM is fully shut down, then right click it in the manager UI. All that matters is: install the correct version of GAs, then configure the guest OS properly. So, after rebooting my guest, my Shared Folder should now be ready to use, right ? The host OS has little or no relevance for GA shared folders.

In the VirtualBox 'Shared Folders' menu dialog, I have also defined one item, with 'Access' set to 'Full', 'AutoMount' to 'Yes' and left the 'At' field blank. I have also successfully installed Guest Additions (in the guest shell, the command Code: Select all Expand view Collapse view lsmod |grep vboxguest returns Code: Select all Expand view Collapse view vboxguest 45056 7 vboxsf which is of the expected form). I have a working Ubuntu 22.04 LTS guest on my Mojave 10.14.6 Mac host. Today, with a newer MacOS and a more recent Ubuntu, I am encountering similar but distinct problems, and the older (and useful) advice I got here no longer seems to apply, hence this new topic. Four years ago, I had trouble with Guest additions & Shared Folders an Ubuntu guest on my High Sierra Mac, and I asked around a dozen of topics about this issues in this forum.

Virtualbox macos shared folder