Before downloading, ensure your Mac meets these minimum System Requirements : Rhino - Rhinoceros 3D

You must create or log in to a Rhino account to receive your license key; no credit card is required. System Requirements for Rhino 7 (Mac)

Once the 90-day period expires, saving and plugins will stop working unless you purchase a license key. However, it will still function as a viewer for Rhino and other file formats.

During these 90 days, you have access to all features, including saving and plugins.

You can download the official 90-day evaluation version of for free directly from the developer, McNeel , through their official download page . Free Evaluation Details