Today supported AC versions are more likely AC24 and AC25. Probably, I can edit that template and make it work for newer projects, but that material is copyrighted, and I need it for commercial purposes. A legal conflict is not my wish.
If there are newer versions of that template, I am looking for download links. If there are no newer versions exist, at least, I am asking for permission to use that material for derivative works.
With that you can generate XCode (as well as Visual Studio) project files. I assume that's also why they are no longer maintaining the "old" XCode template. Also the CMake project is licenced under the MIT license, so it's not a problem to use for commercial purposes.
Bernd Schwarzenbacher Archicad Add-On Developer AC 24-25, VS 2019