I just heard from @sascharode1986, the developer of SDF Modeler, that he'll be working on a macOS version.
SDF Modeler is already available for free for Windows and #Linux.
As far as I'm concerned, SDF Modeler is one of the best SDF 3D tools around at the moment, featuring advanced options like nested shapes and a path-tracing renderer.
Get SDF Modeler here:
https://sascha-rode.itch.io/sdf-modeler
Join the Discord here: