I have read a good deal on this already, but am unable to add my Music folder to the Sonos controller. I have tried the three options: My Music Folder, Another folder or drive..., and Networked Device. None seems to work. When trying the first, 'My Music Folder', I am queried for a password and then get: Unable to add shared folder... My iTunes music is all under my 'Music' folder in my home directory (local to the Mac). My OS is 10.12.5. My Sonos controller is version 7.3.