What Is a 3MF File, and How Is It Different from STL?
A 3MF file (.3mf) is an archive format built for 3D manufacturing and printing. Learn what is inside the package, why it matters, and how it compares to STL.
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How to Open a STEP File on a Mac
macOS has no built-in way to open STEP or STP files. Learn how to open, view, measure, and edit STEP CAD models on a Mac using Solidly, FreeCAD, and slicers.
What Is a STEP File, and How Is It Different from STL?
A STEP file (.step or .stp) stores exact 3D CAD geometry, units, and assemblies under ISO 10303-21. Learn what is inside one and how STEP compares to STL.
How to Open an FBX File on a Mac
macOS has no built-in way to open FBX files. How to open, view, and inspect FBX 3D models on a Mac using Blender, Solidly, and web viewers.
What Is a GLB File?
A GLB file is a self-contained binary 3D model format built on glTF 2.0. Learn what it contains, how it compares to glTF and USDZ, and how to open it on a Mac.
What Is an OBJ File, and What Is the MTL File Next to It?
An OBJ file stores 3D mesh geometry, while the companion MTL file defines materials and textures. Learn how they work and how to open them on Mac.
What Is an STL File?
An STL file stores 3D surface geometry as a mesh of triangles. Learn how it works in 3D printing, how it compares to 3MF, and how to open it on Mac.