There is a currently a Mac app but it is really unpleasant to use — it feels like a port of an app from another platform.

• Does not provide native macOS autofill, instead requires a browser extension
• No tabs or windows
• No keyboard shortcuts, you have to rely on the mouse for everything, not even ⌘, for preferences
• No “rubber band” scrolling which is a basic macOS feature that literally every app has
• With an item selected, up and down arrows scroll a bit instead of moving the selection
• Cannot right click an entry to act on it (delete, move, duplicate, ...)
  • Oh wait, you can't even duplicate items?
• Menu bar items are basically the bare minimum — not even a help menu
• Does not do basic UX things I'd expect literally any app to do, like remembering your sort order between lock and unlock

This feels like a port of a Windows app, not a true Mac app. The result is that is it difficult to use efficiently.

Ideally Proton would improve usability by making the app conform to basic macOS conventions.