For nearly a decade, Autodesk 123D Design was the golden child of entry-level 3D modeling. Positioned as the "Photoshop for 3D printing," it offered a sweet spot between the complexity of Fusion 360 and the toy-like nature of Tinkercad. For Mac users, it was a lightweight, intuitive tool that turned beginners into makers.
If you try to visit the old Autodesk 123D page, you will be met with a 404 error or a redirect to Fusion 360. Autodesk no longer hosts the installer files. Autodesk 123d Design Download Mac
No modern software opens .123dx files natively. Autodesk abandoned the format. For nearly a decade, Autodesk 123D Design was