An unknown error occurred (-45054)

I'm getting the same error and I had no luck finding any information about it, even on Apple support sites. Strangely, it doesn't seem to be affecting the functionality of my iTunes. My Mac is a few years old and the only changes I've made recently were regular software updates (i.e., iTunes 11.1).

Had the same problem after upgrading to iTunes 11.1.

I did a repair of Disk Permissions with DiskWarrior and it solved the problem.

Probably you can use Disk Utility too.

Something is clearly wrong in the way iTunes 11.1 runs on my machine as well.

I am running MacOSX 10.6.8 (Snow Leopard), which is quite old now.

I tried Disk Utility. It enabled me to "Verify" the disk, but said there were no problems.

I'm also running under a "Standard" account, not an "Admin" one. Not sure if that may be relevant If the issue is to do with disk permissions.

When tried to upgrade my iPhone to iOS7, iTunes failed because it said the downloaded file was corrupted. Again, this may be related, or may be coincidence.

Try it with "Repair Disk Permissions".

On my machine DiskWarrior did not find any problems with files, only with the permissions of some iTunes files.

This worked.

Disk Utility "Verify Disk Permissions" threw up a few errors in Common Library permissions.

The "Repair Disk Permissions" seems to have resolved this.

No more error -45054 from iTunes.

Thanks

I used Disk Utility to repair disk permissions--everything has returned to normal. Thanks for the solution!

That worked for me also, thanks for the info.

I completely agree. It seems to be the only thing Apple has done wrong and never fixed (other than there disc drives). Computer has found an error but where not going to tell you what it is. Does not really fit with the way Apple usually operates.

Worked for me too. Literally hundreds of iTunes files with bad permissions were fixed. Lots of other files as well.

"Repair Disk Permissions" worked for me!

Thanks

You will find if you run repair permissions again all those errors show up again, even though they are apparantly no cause for alarm and not an issue, iTuness 11.1 seems a bit buggy tbh.

Where do I find

"Repair Disk Permissions"

in order to fix unknown error 45054

Go to Finder, and go into the Applications folder.

Choose the Utilities sub-folder.

Double-click on "Disk Utility.app"

Select your hard disk (usually the one at the top of the list).

You should see a button "Verify Disk Permissions" and another one "Repair Disk Permissions".

This is correct for Mac OS X Version 10.6.8. - your version might be subtly different.

Hope this helps

Thanks Dennis,

this looks good and the error is gone