Cannot select songs from Itunes for slideshow
I have a problem selecting songs from my Itunes library to add to my Photos slideshow. 90% of the songs are greyed out. Of those not greyed, there seems no commonality between them...some are songs that I've already played a few times in Itunes, some are songs I have not played at all. Practically all of my music has no DRM, none is in the cloud. My itunes library is organised. I have noticed that most solution to this problem advise that DRM protected songs, or those in the cloud are not accesible, but this isn't my situation. My itunes library file (the .itl file) is on my local hard disk, but the media files sit on a network server - I thought it might be that, but some files are playable even though they are on the server, and many are not. Any ideas would be welcome!
iMac (Retina 5K, 27-inch, Late 2014), macOS High Sierra (10.13.4)