There are some problems you may encounter with i Cloud Music Library.
Here's a look at some of the most annoying i Cloud Music Library issues, and if possible, how to fix them.
You can keep track of progress by watching the “Repairing Library” status bar, the process of repairing a library can be fast or very slow, depending on the speed of the Mac, the size of the photo library, and numerous other factors.
The Mac Photos app works well for most users, but occasionally a variety of hiccups can be encountered when interacting with photo libraries, ranging from crashes, to hanging on Photos app launch, a failed import, thumbnails missing from an image library, pictures missing from a library that was imported, or even a completely empty Photos app on launch despite having the proper photo library selected in the Photos app.
If you encounter any of these library management and photo library viewing issues, you can manually trigger a repair of any photo library, which will often resolve the problem being experienced.
One source of confusion for i Tunes Match subscribers is the fact that you no longer see the term i Tunes Match anywhere in i Tunes.
While you're still paying for this service — a year — be aware that i Tunes is not mentioning it anymore.