Download of Onshape 1.63.8302 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program belongs to Productivity Tools. This free Mac application is a product of Onshape Inc. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
Onshape is a full-cloud professional 3D CAD application built for agile product design teams working together using an iPhone, iPad, or a web browser. Onshape was built from scratch for the way today's engineers, designers, and manufacturers really work. All of your designs are stored securely in the cloud and are always up-to-date, so you can switch between iPhone, iPad, and your web browser at any time.
You may want to check out more software for Mac, such as BigCloud Archives, Everport - for moving 37signals' Backpack data to Evernote or MapMan, which might be similar to Onshape.