From a UX standpoint, Swift & AppKit is the only “proper” way to make a native UI for macOS at this current time.

SwiftUI is a mobile focused framework still being adapted to macOS, I think it’s just gotten tables this year? And even the best Catalyst app in the world (craft.do) will sit somewhere in between Electron and uncanny valley at times when it comes to things as simple as a button.

I would highly recommend using AppKit if the app is even slightly nontrivial and fit and finish is a goal.

If it’s a simple app and you’re ok with visual hitches and oddities but would like a native macOS “skin”, SwiftUI.

If fit and finish isn’t important, just use Electron.