Yes, the first time I just follow the instruction and when I saw the 503 error, I guess something was missing. From my experience it is something that can seriously mislead users. Ok, I'll change the documentation to add the start all the stuff in the VM priori to try pinging the VM.

Maybe it worth rewrite the whole beginning to create a real step a by step setup (do this then do that, then...). At least for Mac, it should be quite straight forward.