Greyed out CD tracks
I recently updated my iMac software and since then have been having problems opening tracks from my own CDs. Everything else is working 100% (videos, podcasts etc) but all art work is missing from the CDs.
When I try to open a track a ! appears beside the name indicating the original info for the tracks can't be located.
This is the same for all my CDs. I have tried all the usual remedies — transferred from backup etc — but absolutely no joy.
I have had various suggestions but no luck. Where to from here?
OBS, iMac (21.5-inch Mid 2010), macOS High Sierra (10.13.5), Intel i3 8GB memory