I run a artist and get clean meta + album art. However, when I view in iTunes little to nothing’s changed. Some album art shows up, some doesn’t. Same with the other data.

If MP3tag shows the changes then I would assume that this is an iTunes problem. You have to trigger itunes to re-read the data. One way would be to delete the entry from iTunes and then re-import the files.

There was also a compatibility issue with v1.0.2 which triggered a bug in iTunes: [image] Problem with Adjust Cover Quick Action Mac Hi and welcome! I think the issue you're observing is due to a bug in iTunes/Music.app which can be observed with the version of Mp3tag yo…

MAC: iTunes Album Art

Mac

Florian March 9, 2021, 7:03am 3

There was also a compatibility issue with v1.0.2 which triggered a bug in iTunes:

So if you're using v1.0.2 make sure to update