Over the past few months, some users have been unable to sync their Apple Music library between their iPhone and Mac, seemingly due to a bug.
Affected users receive the following error message in the Music app on the Mac:
Genius results can't be updated right now. An unknown error occurred (18004).
There are complaints about the issue across the Apple Support Community, MacRumors Forums, Reddit, and elsewhere on the internet.
The underlying cause of the issue is unclear, and it's not entirely clear if a fix will require software updates, or if Apple can implement a server-side fix. We've reached out to Apple for comment, and we'll update this story if we receive a response.
This issue comes after another Apple Music bug related to playlists was fixed last month.
Top Rated Comments
I was burned by Apple Music in the transition from iTunes to Apple Music — my carefully curated music library literally — yes, literally — destroyed.
An 800GB+ music library that had been carefully sorted in albums and playlists. Mangled.
partial albums uploaded. Lossless files replaced by lossy.
Cover artwork? Pffft. Mixed and matched… missing.
Artists mixed up and ignored.
Broke my heart.
Unless there is a major rebuild from the foundations up, I will never be tempted to again.
Why other services could achieve it and the giant Apple cannot is a mystery.
And yet, how often do we hear that Apple really cares about music. "It is in our DNA" they say… yeah sure.
Disgraceful that the people who invented the iPod can't do music and playlist transfers. This shouldn't just work—it should be seamless.
It's awful.
Pepperidge Farm Remembers™