Making an App for MacOs

Ive had great success learning to code Swift with Chris and his video tutorials. Im now trying to make an app that displays 3D photogrammetry models of WWII wrecks in the South Pacific, but due to file size and memory requirements it won’t run on mobile devices. Now to the problem…all the knowledge I have and resources I can find are for making mobile apps. Any chance anyone knows of some resources for getting comfortable with the differences in the UI Builder and new menu options? Any help would be great!

I also am trying to program a macOS app. But I don’t really get how the Mac dev interface works.
FYI I’m trying to develop a 2d scrolling
Maybe also a simple web browser.
Don’t have any know-how yet.
Any resources would be perfect.