macOS may be a bit behind iOS in terms of support for the latest stuff... but Apple is pretty clear that Swift and SwiftUI is the way to go for new apps (Mac and iOS). I hope this works out for you, but you may find yourself rewriting and relearning many things eventually. It is going to take a long time, but Obj-C and AppKit are essentially deprecated. I'd also be skeptical about using tools like Platypus long-term. If I were you I would have jumped all-in to Swift/SwiftUI and Xcode for managing your project, and only use the old stuff when you have a very specific need to.