Building Native macOS Apps with Claude Is a Different Beast Than Web Dev

Building Native macOS Apps with Claude Is a Different Beast Than Web Dev If you have used Claude to build a React app, you know it is remarkably good. Drop in a description, get working code. But try building a native macOS app in Swift and the experience changes completely. The reason is simple - training data. There are millions of React tutorials, Stack Overflow answers, and open source repos. For AppKit? Maybe a few thousand relevant posts, many of them outdated. SwiftUI is better but still has gaps, especially for macOS-specific features that differ from iOS. Where Claude Hallucinates The most common failure mode is Claude inventing APIs that do not exist. It will confidently write NSWindow.setFloatingBehavior(.alwaysOnTop) - a method that sounds right but has never existed. The real approach involves setting window.level to .floating and configuring the collection behavior. Accessibility APIs are even worse. Claude will suggest AXUIElementCopyAttributeValue calls with attribute n