macOS
- Quit Rhino before replacing an earlier Datum beta build.
- Open the provided Datum.Rhino.rhp plug-in with Rhino and accept Rhino’s install prompt.
- If dragging the file into the modeling viewport shows Open, Import, or Insert, cancel that dialog. The viewport is treating the plug-in as a model file rather than installing it.
- Restart Rhino, run the Datum command, and confirm that the Datum panel opens.