# Xcode 16 Features

Modern development tools and optimizations for macOS 26 development.

## Swift 6 Support

```swift
// ✅ Enable strict concurrency checking
// Build Settings > Swift Compiler > Strict Concurrency Checking: Complete

// ✅ Use Swift 6 language mode
// Build Settings > Swift Language Version: Swift 6
```

## Apple Silicon Optimization

```swift
// ✅ Build for Apple Silicon
// Architecture: arm64 (for M-series chips)

// ✅ Optimize for M5
// Build Settings > Deployment > Architectures: arm64

// Performance improvements automatically applied for M5
```

## Previews and Testing

```swift
import SwiftUI

// ✅ Xcode Previews
#Preview {
    ContentView()
}

// ✅ Multiple preview configurations
#Preview("Light Mode") {
    ContentView()
        .preferredColorScheme(.light)
}

#Preview("Dark Mode") {
    ContentView()
        .preferredColorScheme(.dark)
}
```

## Debugging Tools

- Instruments improvements for macOS 26
- Memory Graph Debugger enhancements
- Network debugging tools
- SwiftData debugging support

## Resources

- [Xcode 16 Release Notes](https://developer.apple.com/documentation/xcode-release-notes)
- [Swift 6 Migration Guide](https://www.swift.org/migration/)