How to convert my Apple Music playlist.
Apple Music works differently if you have an unofficial playlist or a managed one. Only a conversion from a managed playlist is allowed.
How to sync Apple Music with an unofficial playlist?
- Go on Apple Music
- Create a Managed playlist
- Find your unofficial playlist under Music Playlist

- Select all the tracks of your unofficial playlist by pressing Cmd+A
- Slide the tracks of your unofficial playlist towards your managed one
