Error occurs when trying to sync Apple Music library between iPhone and Mac

Same issue here for approx. 3 weeks now. Tried restore from backup, macOS recovery, signing out and in several times, nothing works. Also signing out, changing password and signing back in hasn't worked for me. The issue appears on my MacBook and my iPhone after stop syncing and enabling it again.

Also Apple support wasn't helpful yet....

I experience this issue since yesterday (21 December). My MacOS Music app won't load the Cloud Library anymore. The Music app on my iPhone seems to be unaffected (so far), that still shows my entire music catalogue.

I tried the solutions mentioned above, but none of them worked for me.

I have the same since today. On my Ipad, my Iphone and on my mac all playlists are gone. I logged out and changed the apple ID password. Not helpful. When logging into my music via Sonos, I can see my playlists. Also on my old iphone I can see them. Don't know what to do now...

I checked the Apple Music player on the web, and as you can see on the web player on the left side, my library is intact. However, on the right side in the app, you will only see the downloaded items until 2021 and one item from 2022. And unfortunately, it's on Ventura too : (

I have the same problem as everyone. I thought it was just on my Mac Studio as iPhone and iPad looked okay. But I bought an album on my iPhone and it has not added it to the library. I can see it under purchases but it's not syncing.

Same Problem here! "...Genius...(18004)."

I have already tried the following serval times:

- Restarted Apple Music

- Restarted Mac

- Signed out of Apple Music and signed back in.

- Signed out of iCloud and signed in again.

And nothing has worked!!!

MacBook Air, 1.1 GHz Quad-Core Intel Core i5, 8GB, 256GB; MacOS: Sonoma 14.2.1 (23C71)

I’m in the same boat. Web app still shows my library. All other devices have lost access - either just times out silently when syncing or pips up with an error.

Really frustrating.

I think there’s some larger syncing issue at hand though - I lost a whole day’s worth of Fitness+ data yesterday, and it now says my birthday is a day before what it actually is.

Same problem.

1) Music app on M1 Macbook Pro 14' (Sonoma 14.2.1) unable to sync - Error 18004. Tried signing out from the Music app and from Macbook settings and changing password. Doesn't work for me. Same error still.

2) Library on the Web player in Safari seems to be ok and updated.

3) Library on the new iPhone 14 (iOS 17.2.1) has only about 40 songs I purchased in iTunes. And it doesn't synch with iCloud library.

Very frustrating.

Considering on switching to YouTube Music or Yandex Music.

Same here. I bought a MacBook Air M1 and when I logged into iCloud everything crashed.

I also lost library on my iPhone too. An inexplicable phenomenon.

All my music is OK at https://music.apple.com/

[Edited by Moderator]

I just spent a bit of time on chat with them too. They asked me to do exactly what I had already tried (sign out and back in of iCloud, tick and untick the sync library).... Then was told it would need to be escalated to a senior support person. Maybe we just have to stick it out and see if Apple comes through for us!

Wasn't much more help - just tried the same things and said to see if it sorts itself. I explained that I am now paying for a service which isn't working as advertised and I am not happy about it. Was told he understands but can't do anything.

Same here. Everything was working fine until I changed my Apple ID email address, which didn't go smoothly, and I had to log out and log back in on all my devices. The iCloud Music Library refuses to sync and throws error 18004, precisely like in your case. I've lost thousands of songs and all my playlists. It's not syncing on any of my devices, Macs, iPhones or iPads.

The workaround of changing the password while logged out from iCloud didn't work for me.

I opened a ticket and chatted with several operators while trying to identify issues with anything but Music. It's definitely a bug either on Music app or cloud backend systems.

I'm sure a bunch of Apple devs too are experiencing the problem now :] I'd be pretty sure they will address the bug sooner or later.

I have the same problem on my iPhone (iOS 17.2.1) and M1 MacBook Air (Sonoma 14.2.1). The iPhone keeps syncing but only shows purchased content, no playlists or any song in my iCloud Library. The MacBook throws an error 18004 after reactivating iCloud sync.

I’ve tried to log out and back into iCloud on both devices and changed my password, but no effect.

Web version shows most songs and even new added playlists in native apps on iPhone or MacBook. Recently added songs are missing in playlists, since I’ve started to experience syncing issues a few weeks ago.

This is really frustrating I bought my wife a new MacBook Air for Christmas so she had her own laptop to manage her extensive iTunes library. Now we can't get the music even accessible on the device because it won't sync and we get the 18004 error. I think Apple are badly letting down their customers who invested heavily in buying music via their music store. We have been to the local Apple store several times with issues in the past and their default answer is pay a subscription for Apple Music. She pays for the iTunes Match service and has spent thousands on her music collection. Apple need to get their act together and get back to quality and reliability instead of just chasing subscriptions.