Album cover won't show in Finder

Yes, I agree that the symptom is on Finder, but is at least a little bit strange you reinstall iTunes and everything it's working again.
I believe that some service installed with iTunes is essencial to quicklook works on Finder. And after restart the machine, this service is not starting anymore.

For me, after reinstall the iTunes (without restart de machine), everything it's working (track cover and track infos).

Best,

I believe that it is an iTunes issue!

Note:

I tried before to uninstall iTunes following a Sierra guide but didn't worked.
Than I try to reinstall (without uninstall) the iTunes downloading the dmg file in the iTunes site. And after install the iTunes, everything is working again.

I believe that some service (iTunes or other) not start with the macOS when you reboot your Macbook.

What I did was drag all the mp3 and m4a files at once into an app called Music Tag Editor and then just hit "save". Then a couple minutes later all the artwork appeared in the normal "details/list" view in finder with the unfortunate side effect of having all the dates changed to the current date which means no sorting by original date order. But otherwise it is sticking through 10.13.2 beta 4 now.

Finally it's fixed 🙂

The new iTunes 12.7.1 seems to have fixed the problem.

Fixed in latest beta 4 of macOS High Sierra 10.13.2 Beta 4!

I think it's the only solution for this moment . I downgrade in Sierra with iTunes 12.6.3 ( Deploy apps in a business environment with iTunes - Assistance Apple) i retrieve my APPs in iTunes and covers

and i will see later for a new upgrade .

I had this problem too, but I was able to fix it by reinstalling iTunes with the version on Apple's website.

As Noctis said, you have to used any tool for clean the cache on the system.

I used Cocktail and everything works fine after reboot.

I received a call back from Apple support today regarding the escalation to engineering for this issue.

I was told they have received many reports on this problem and it is now a known bug with the High Sierra. I was also told that they are working on a fix, however there is no ETA as to when or how (update, workaround, etc) the fix will be made available.

So the good news is that they know about the bug and acknowledged that it exists, but the bad news is we have no idea when they will fix it.

After reading all comments, the only solution that works for now to get all you're artwork on you're file...

Copy and paste in "read the information" when you right-click on the file!

It's for sure the longest line but it's the only way to success for right now!

Citation: If it was easy we would have already destroy the world - AM

well, I installed sierra again... and now it looks good.

"thanks" apple

I downgraded back to Sierra

Sent from my iPhone

have you tried to:

- Play the track in itunes, then go back to finder and confirm that you see the cover

- reboot, and check again