Missing App Icon Artwork
MacBook Pro (15-inch Late 2011), OS X Yosemite (10.10)
MacBook Pro (15-inch Late 2011), OS X Yosemite (10.10)
if that happened to me, I would use iTunes' menu to do:
File > Library > Get Album Artwork
Yes, I know you are not talking about albums.
I thought so too I've tried it a few different ways- but alas nope - didn't work. Made sure I was in apps not music - but on the upside - my album art was updated.
Missing App Icon Artwork