Download of Metasequoia 4.8.5 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program is included in Design & Photo Tools. The latest installer that can be downloaded is 72 MB in size. We recommend checking the downloaded files with any free antivirus. This software for Mac OS X is a product of Tetraface Inc.
From the developer:
Metasequoia 4 is the 3DCG modeling software for macOS / OS X. You can use it in much the same way on different platforms. All GUI components are displayed by vector drawings. Buttons and icons are displayed beautifully, in high-resolution monitors (like as IGZO or Retina display).
You may want to check out more Mac applications, such as X To 3DMF Converter, which might be similar to Metasequoia.
3D Design