This is a GitHub Project and you can get complete source from there
GITHUB
Autodesk 123D Design was once a popular, free 3D modeling software aimed at hobbyists, makers, and beginners. It offered an intuitive, entry-level gateway into CAD (Computer-Aided Design) without the complexity of professional tools like AutoCAD or Fusion 360.
One of the safer methods is the or trusted software repositories like filehorse.com or macdownload.informer.com . Autodesk 123d Design Download Mac
Typical filename: 123D_Design_R2.2_Mac.dmg (or R2.0) Autodesk 123D Design was once a popular, free