With the risk of sounding rude, that’s what you get for using a proprietary system. Do NOT support Apple, and their usage of DRM protected, user screwed systems that are iTunes etc.
Our lives begin to end the day we become
silent about things that matter.
So, it appears the only way to play music purchased from Apple (mp4
audio files) on Linux is to burn a CD, then rip them - or, use CrossOver