I've also succeeded with the comment in the virtual buddy repo, updating my UTM Sonoma beta 7 to rc.
I can't stress enough how vital better virtualization support for us developers is. There are just so many roadblocks to virtualizing, and thus, testing other OS versions, it has become a major issue for our company. We're developing software for large enterprise customers and require a thorough testing environment across all supported OS versions. It's bad enough that there is no more professional virtualization software for macOS guests, since Parallels seems to have given up on that topic completely and UTM remains the only option. Also, the limitation of 2 VMs running simultaneously needs to be lifted ASAP and support for remote debugging needs to be added to Xcode. I'm not even getting started on better developer documentation...
I don't mean to rant, but there's just so much frustration accumulated. I really enjoy macOS, but developing for it, especially when it's not a GUI app, shouldn't be this frustrating and full of roadblocks.