Currently with the new license system Rhino is licensed to the user not to the system. So if you have a machine with multiple users or users who use multiple machines this would become a huge pain. Zoo seems like a possible solution but Mac Zoo is supposed to be a long ways off.
The user licensing is not how the Windows version works. I would suggest Mac Rhino work the same way with the license on the box.
Not a issue during the beta, but a huge issue when things move out of beta for companies.