iTunes in my iMac not saving ID3-tags to mp3-files

Hi,

I have searched for an answer for this problem for some time, but could not find a good solution on the internet.

Since a couple of months iTunes is not saving changes I make to ID3-tags to my mp3-files. Every time I change the tag (song info and/or artwork) and save it, it changes back to the original tag and/or artwork. I have no problems with saving tags and/or artwork to ALAC-files.

I found this option in a forum: I have tried Converting ID-3-tags to None (and all other options) but with no satisfying results. I lost artwork and it couldn’t be restored (because iTunes won’t do that). Also, the new tags couldn’t be saved (were changing back). Luckily, I made a backup of the files before I started this, so I could restore the original files with original artwork.

OS: Mac OS Mojave 10.14.3 with all updates installed.

My library and all the files are stored on an external USB hard drive (mac OS extended (journaled) formatted). I have full rights/permissions. Remember, I can save new tags and artwork to ALAC-files.

The strange thing is: I have a Windows 10 notebook with the most recent version of iTunes installed and I have no problems at all updating, changing ID3-tags and artwork.

So, my workaround for the moment is copying mp3-files from my iMac to iTunes on my Windows notebook and do what I have to do with the mp3-files and then copying them back to iTunes on my iMac. I’m getting tired of still having to start 2 devices and copying files between those devices.

What is wrong with my iTunes on my iMac? If there is already a topic with a solution (I couldn’t find it), please post the link. If someone have an answer, please share.