I use iTunes as my main media player and I’m user of iTunes Match since the service was available to Spanish users. It’s a service I really like but recently I’ve experienced an estrange issue: some songs appeared greyed out (even complete albums). I could download them and play them individually but when playing a playlist or album with greyed out songs, iTunes completely skipped them.

Today, thanks to iMore forums, I discovered how to fix this issue.  You have to list all your songs, this can be done following these steps:

1. Select Music tab on iTunes’ leftmost button bar.
2. Choose either My Music or Playlists in the middle tab bar.
3. Open Sort popup by clicking rightmost button in the bar you’ve been interacting with.
4. Finally, in the dropdown, choose Songs.

You’ll notice that the first column with header has no clear title but a simple check icon. You can customise all the columns but this one, which is always displayed regardless your settings. Checked songs will be playable and unchecked ones won’t. I don’t know why some of my songs where checked and others unchecked neither what really means that a song is checked or not but checking all my songs fixed the issue so, finally, to fix the greyed out issue:

1. Select all your songs.
2. Control-click any of them.
3. On the displayed menu click on Check selection.