The problem

If you’ve been running the VirtualBoxExtPack.munki.recipe AutoPkg recipe, and you’ve noticed the VirtualBox Extension Pack postinstall script in Munki hanging indefinitely (30 minutes and beyond), it’s because the license hash has changed.

The fix

According to @jessepeterson (the maintainer of that AutoPkg recipe), the license hash doesn’t change very often, but it did change, and @lctrkid made a pull request (now merged in) on that recipe repo to put in the new license hash, so you may have to run a autopkg repo-update jessepeterson-recipes and then possibly re-create the recipe override or manually add the license part of the override.

Some background

The license hash is something you can find by manually running a command like this (with the actual extension pack in your Downloads folder, of course): sudo /usr/local/bin/VBoxManage extpack install --replace ~/Downloads/Oracle_VM_VirtualBox_Extension_Pack-6.1.14.vbox-extpack. It will display the whole license, and then prompt you to accept the terms: Do you agree to these license terms and conditions (y/n)? y

Once you’ve accepted, you will then see the hash:

License accepted. For batch installation add
--accept-license=33d7284dc4a0ece381196fda3cfe2ed0e1e8e7ed7f27b9a9ebc4ee22e24bd23c
to the VBoxManage command line.

0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
Successfully installed "Oracle VM VirtualBox Extension Pack".

Acknowledgements

Special thanks to @lctrkid and @jessepeterson on the MacAdmins Slack for helping understand what’s going on.