There are many online tools available to automatically fix this.But it won’t work for the tracks that came from some obscure CD that iTunes has never heard of.
Luckily we have a very simple solution to fix this without requiring any application to download.
The process is simple:
- Select the songs that belongs to the same album.
- Right click on it and select ‘Get Info’ option.
- Drag the art from your browser(using google image search) into ‘Artwork’ image box located at the right-side of the dialog. You’re done!