why is half the music on iTunes on my iMac (I think mainly tracks imported from CDs) greyed out? I can only play single tracks but not the whole album or even a set marked as a 'grouping' in Itunes info. I've tried reverting to my pre-update library (as suggested in http://support.apple.com/kb/TS1967?viewlocale=en_US), but it doesn't help.
No idea if it's connected but the update also changed my iphone settings to autofill and I think made one or two other unwanted changes. But this seems to be a problem with itunes on my imac
All advice gratefully received!
iMac (21.5-inch, Late 2012), OS X Mountain Lion (10.8.5)
