If you are using external devices or folders (other than "Music") to synchronise music to your phone, you have to enable access on a Mac software. To do this, go to File > Allow Access to Folder.
- Can I download music and videos from OneDrive to my Lumia phone?
- Can I share videos on my Lumia phone?
- What to do if I cannot see my songs in the Ringtone Maker on my Lumia phone?
- Which media formats does Play To support?
- I can share pictures with Play To but why do my videos not play on my TV or Blu-ray player?