Subscribe to a playlist in iTunes on Mac
In the iTunes app on your Mac, choose Music from the pop-up menu at the top left, then click Browse.
Click Playlists and find a playlist you want to subscribe to.
Control-click the playlist, then choose Add to Library.
To view your subscribed playlists, choose Music from the pop-up menu at the top left, then select a playlist in the sidebar on the left, below Apple Music Playlists.