I was looking for answers to a weird issue I was having with my ATV tonight. Over the past couple days I was loading a prized library of Grateful Dead shows on my Mac. (Had to do this because I made the mistake of syncing the GD library with my Apple Music account which caused all sorts of havoc with song numbering, artwork, etc. What a mess it was!) Anyway, I wanted the newly reloaded GD library available on my ATV to play through my stereo.
Previously everything had worked just fine with accessing the music library on my Mac through the Computers app on the ATV. However, this time ATV could not find my music! I got this message, "no music was found in you library". Not good.
I searched for possible solutions all over the internet. Tried logging out, unsharing and resharing multiple times, unplugging things, etc. Nothing worked. I could see the GD library on my phone under Home Sharing in the Music app. I could see my Photos on the ATV, but not the music library.
I tried one more search and came across this Reddit thread:
A response to the OP read similar to my situation. In fact had not tried the search feature in the Computers app, but with that I could see all my music! The main thing that the poster stated was there was some sort of recognition issue when a genre was not available/used. I have no assigned genre to the GD albums in my library.
The light bulb went off! So I went to my GD library on the Mac and added a genre for one of the several albums (all had been empty (ie, null values)). After I did that and restarted my ATV, the entire music library on my Mac was available!
So, hopefully this account can be found by others and help them if you run into a similar issue! Happy listening all.