There are many alternatives to MeshLab for Mac if you are looking for a replacement. The best Mac alternative is Autodesk Fusion. It's not free, so if you're looking for a free alternative, you could try Autodesk Fusion or meshmixer. If that doesn't suit you, our users have ranked more than 10 alternatives to MeshLab and five of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to MeshLab are OpenFlipper and Castle Model Viewer (ex View3dscene).
Integrated CAD, CAM, and CAE suite offering cloud modeling, simulation, and manufacturing tools with collaborative editing, free-form and parametric design, licensing for students, hobbyists, and startups, plus support for 3D printing and CNC machining.
meshmixer is an experimental 3D modeling tool for making 3D mashups without too much hassle.
CloudCompare is a 3D point cloud (and triangular mesh) processing software. It has been originally designed to perform comparison between 3D points clouds only. It relies on a specific octree structure that enables great performances(1) relatively to this particular function.
Multi-platform app and programming framework designed for processing, modeling and rendering of geometric data (bvh, off, obj, ply, stl, vtk).
view3dscene is a VRML / X3D browser, also a viewer for other 3D models. Supported formats are X3D, VRML (1.0 and 2.0 (aka VRML 97)), Collada, 3DS, MD3, Wavefront OBJ scenes. Can do collision detection. Can be used as command-line converter from Collada, 3DS, OBJ, MD3 to VRML/X3D.
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Meshlab is not maintained since 2016