If I put my Rhino 7 and Rhino 8 Upgrade Licenses in the Zoo, what happens?

You’ll need Zoo 7 SR 8 (or higher) to support Rhino 8 license keys. The Zoo will group your Rhino 7 and Rhino 8 Upgrade keys into a license “cluster”, and will make sure only one is in use at any given time. A user who runs both Rhino 7 and Rhino 8 from the same computer will use only one license.