macOS App Update & SwiftUI Integration

I need a skilled macOS developer to update my macOS App, originally built for macOS 10.11, to the latest macOS 15. The app predominantly uses Swift, but I want to transition it to incorporate more SwiftUI and replace the older in-app purchase method with Storekit 2. This should be a straightforward task for the right professional.

Key tasks include:
- Updating the app for macOS 15
- Integrating more SwiftUI, particularly focusing on layout and navigation, and optimizing performance
- Enhancing features, fixing bugs, and improving user experience
- Upgrading Machine Learning capabilities using the latest technology
- Refining the In-App purchase system

Ideal skills and experience:
- Extensive knowledge of macOS development
- Proficient in Swift and SwiftUI
- Familiar with Storekit 2
- Experience with Machine Learning integration
- Strong problem-solving skills for bug fixes
- Prior work improving user experience in apps