How to fix "configure: error: libproj not found in standard or given locations." when installing {{sf}} on macOS?

Hi, and welcome!

Thanks for the contribution. We who are on macOS pay a price to hang on to all the polished conveniences and consistent conventions. This is a great example.

FYI for any coding questions: Please see the FAQ: What's a reproducible example (`reprex`) and how do I do one? Using a reprex, complete with representative data will attract quicker and more answers.