Hiring a Mac operating system developer comes with numerous advantages. First, these developers are well-versed in the Apple ecosystem, ensuring a seamless integration of applications across various Apple devices, enhancing user experience. They can create applications that leverage the unique features of macOS, such as Mission Control, Spotlight, or Touch Bar, leading to more innovative and intuitive applications.

Second, Mac OS developers are familiar with Apple's strict and high-quality development standards, which means they can develop secure, efficient, and reliable applications. They are adept at Swift and Objective-C, programming languages used in macOS development, which enables them to create fast and powerful applications.

Third, Mac OS developers can help businesses reach a high-value audience. Apple users are often willing to pay for high-quality apps, providing a potentially lucrative market.

Lastly, they can assist in ensuring applications conform to Apple's App Store guidelines, increasing the chances of app approval. Their expertise can also be vital in maintaining and updating applications to keep up with OS updates and new features.

In summary, hiring a Mac OS developer can lead to high-quality, innovative applications, secure and efficient software, access to a high-value market, and smooth navigation of the Apple ecosystem and App Store.