Download of Autodesk FBX SDK 2014.2 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.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The software is included in Developer Tools. This free Mac application is an intellectual property of Autodesk.
From the developer:
Autodesk FBX SDK... Autodesk FBX technology provides a free platform-independent 3D authoring and interchange format that provides access to 3D content from most 3D vendors and platforms. The FBX file format supports all major 3D data elements, as well as 2D, audio and video media elements.
This C++ software development kit (SDK) that lets you import and export scenes in the .fbx file format.
You may want to check out more software for Mac, such as FbxConverter, Autodesk Inventor Fusion or Autodesk 3D Print Utility, which might be similar to Autodesk FBX SDK.
3D Design
3D Design