Supporting blender helps with (artistic) 3D content creation on the Mac, but I'd like to see some effort in the functional CAD space as well, especially with the proliferation of 3D printing and affordable CAM machines. There's really a lack of options on the Mac for this, the "heavy hitters" are all Windows only: Catia, NX, Creo, Solid Edge. Solidworks dumped their Mac version a couple years ago. None of the Autodesk stuff other than Fusion360 runs on Mac. OnShape works, but only because it's web based, not a native app that can be run offline.
On the open source side, you have SolveSpace and FreeCAD. SolveSpace is feature constrained, and FreeCAD is where blender was 10-15 years ago ... powerful, but still behind the commercial offerings and with a UI that is not very "forgiving" or "discoverable." For both of those projects, it feels like the Mac port is sort of a 2nd class citizen, in that the main devs don't use Mac, so it's up to talented members of the community to make sure builds are up to date. Apple making sure those projects have access to Mac resources would ensure we don't lose what little bit of support exists there too.
(Edit: yes, there's Rhino - which is more a freeform NURBS tool, and less a parametric CAD app, and some fringe CAD apps like Cobalt or Corel, but the mainstream apps are missing.)