As a skilled and experienced macOS developer with over 10 years in the software development industry, I am the ideal Freelancer to turn your Python hex-to-decimal conversion script into an easy-to-use and visually appealing macOS application. My proficiency in Xcode, Objective C, Python, and Mac OS ensures that I'll not only meet but exceed your expectations. From integrating Python scripts with UIs to understanding file upload functionalities on a macOS application, I have got you covered.
Furthermore, my expertise extends beyond just building user-friendly UIs. I have a deep understanding of the workings of the Python programming language which will be instrumental in efficiently packaging and implementing your existing script into the macOS application. Additionally, my experience with Dark Mode compatibility adds an extra layer to my capabilities that could really enhance your project.
In conclusion, choosing me for this project means investing your trust and resources in a seasoned developer who knows how to create efficient, clean, and intuitive software applications for macOS. I guarantee a high-quality final product that perfectly complements your existing script while delivering a streamlined and user-friendly interface for anyone using it. Let's come together and bring this project to life in the most professional and satisfactory manner possible.