I did macOS runners this way, combining the runner with the VirtualBox executor. Best part is once you set up the base VMs (one per macOS version), the runner i

I did macOS runners this way, combining the runner with the VirtualBox executor. Best part is once you set up the base VMs (one per macOS version), the runner is smart enough to take a snapshot right after boot and restore that on subsequent runs, which not just makes job running stateless, but also makes job worker boot about 2s.