Since animating preview is not yet available in RhinoMac this might be an option for some.
Anyone who uses 3D modeling software and wants to share designs and/or models with clients and/or friends may want to take a look at getting a free account on Sketchfab. Since you already know how to use your 3D modeling program using this is very easy. Here is a link to one of my models on Sketchfab. https://skfb.ly/CZSV
And here is the link to sign up. https://skfb.ly/CZXD