I can not add iTunes songs to slideshow under new Photo
the song title are greyed out. When I selected a song for the slideshow, an error message popped up saying: "The select audio track is not supported. DRM-protected audio cannot b used in slideshows. Choose another audio track.", but I can still play those songs under iTunes.
Question:
1 - why the songs are greyed out?
2 - how do I clear out the DRM-protected?
I did re-download the songs from my "purchased" from iCloud but no prevail. I also followed some tips from the forum to delete some iPhoto preferences but again no prevail.
I recently updated my oS to OS X El Capitan and Photo.
Is this a bug with Photo app?
Thanks!
J.N