I didn't do anything fancy - picked Sonoma in the Macinabox container, pretty much everything else was vanilla. I bumped up CPUs to 8 and RAM to 16 in the MacOS VM. No problems with Sonoma, it let me login to my Apple account on launch. On another note. Before my attempt to upgrade Sonoma, I took a snapshot of the VM hoping to revert it in case of failure. After the failure, I reverted to the snapshot, but my VM is not getting past about 40% on the startup progress bar. Looks like I'm starting over.