I have local files, which i would like synchonise to my iphone, newest OS. I did this long time ago, and it worked fine. Now, after defining an new playlist on my macbook i just can see the playlist name, but no songs inside the playlist. The same test i made with my ipod in the same local network (WLAN), i didn't work. With my android mobil it works perfekt, i see the songs, can take it offline. I'm working with one spotify account (premium) and one apple account for both devices (iphone and ipad).