Mac design Apple already designed your app. Pick the right system parts, arrange them, and stay out of their way. Use the system first. Add custom design only where the system has nothing. - The full checklist with sources: design-rules.md. Use it for reviews. - Copyable SwiftUI code: patterns.md. - The Settings window: settings.md. - Toolbars: which item goes where, per column: toolbars.md. - The menu bar, context menus, and the Dock menu: menus.md. - Apple's current text on one topic, when a rule here is not enough: (for example , ). It prints the HIG page as plain text. - App-wide tokens (…