The iPhone (and previously iPod), from day one, could never simply be mounted as an external USB (or networked) file system. You always had to do the ridiculous "sync" song and dance and use their proprietary software, instead of just copying files using the OS like every other external storage device. Maddening.
more maddening yet is you can actually mount it as a limited storage device using https://libimobiledevice.org/ under linux, but not MacOs(to my knowledge)
How do I copy music to my device?
Sorry, music synchronization with newer devices is currently not supported but if you are a keen developer why not contribute a new service implementation for the ATC Service?
