Previously, it was reported that the new standalone Music app in the upcoming macOS 10.5 would be made using Marzipan, a framework that lets iOS apps run on the Mac. However, sources familiar with the development of the OS have now said that the macOS Music app will instead be an AppKit application, based off of iTunes (via 9to5Mac).
Sources say the standalone Music app for macOS will include many of the advanced features iTunes users are accustomed to, including smart playlists, advanced library management, syncing with iPods and iOS devices, as well as disc reading and burning:
“This new version would be the final step in the process that started with iTunes 12.7, which was updated to focus on music, movies, TV shows, podcasts, and audiobooks. With new standalone apps for all media types on macOS 10.15, iTunes becomes focused on just music and gets renamed to Music, like its counterpart on iOS.”
It is also believed that an older version of the iTunes app will be kept available for users who need extra features.