How to change Album Artwork if wrong??

Copy and paste normally works for me. Also try cutting (Command-X) the artwork that you placed in error.

 

Right click on the song, then go to 'get info' and hit the 'artwork' tab. In there you can delete the wrong cover.

 

Another way to do it is to select the song that has the problem and do a "Get Info". There should be an "Artwork" tab. Select it and you should see all of the pasted artwork for that song/movie/file.

You can delete or add artwork from this dialog box.

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