123D Catch is not available for Mac but there are a few alternatives that runs on macOS with similar functionality. The best Mac alternative is Agisoft Metashape. It's not free, so if you're looking for a free alternative, you could try openMVG or Pix4Dmapper. If that doesn't suit you, our users have ranked nine alternatives to 123D Catch and four of them are available for Mac so hopefully you can find a suitable replacement.
Agisoft Metashape is a stand-alone software product that performs photogrammetric processing of digital images and generates 3D spatial data to be used in GIS applications, cultural heritage documentation, and visual effects production as well as for indirect measurements of...
Some users think Agisoft Metashape is a great alternative to 123D Catch, some don't.
MicMac is a free open-source (Cecill-B licence) photogrammetric suite that can be used in a variety of 3D reconstruction scenarios. In aims mainly at professionnal or academic users but constant efforts are made to make it more accessible to the general public.