iCloud Error 54
Apple macOS
Severity: ModerateWhat Does This Error Mean?
iCloud Error 54 'Operation Not Permitted' means iCloud tried to sync a file but macOS blocked it due to permissions. This often happens after a macOS upgrade when iCloud has not been granted Full Disk Access. The fix is straightforward: grant iCloud Drive the correct system permissions.
Affected Models
- MacBook Air
- MacBook Pro
- iMac
- Mac Mini
- Mac Studio
Common Causes
- iCloud Drive does not have Full Disk Access permission in macOS Privacy settings
- A macOS update reset privacy permissions, removing iCloud's ability to access certain folders
- A specific file in iCloud Drive has strict permissions that block the sync process
- Your iCloud Drive folder was moved or its permissions were changed manually
- A third-party security or antivirus app is blocking iCloud from accessing files
How to Fix It
-
Grant iCloud Drive Full Disk Access. Go to System Settings > Privacy and Security > Full Disk Access. Click the + button and add both 'cloudd' and the iCloud Drive app.
Full Disk Access allows iCloud's background processes to read and write files anywhere on your drive, which is needed for sync to work properly.
-
Restart the iCloud process. Open Activity Monitor (Applications > Utilities). Search for 'bird' and force-quit it by selecting it and clicking the X button. Also search for 'cloudd' and force-quit that too.
These are the background processes that run iCloud sync. Restarting them clears any permission errors they have cached.
-
Check permissions on the iCloud Drive folder. Open Finder and navigate to your iCloud Drive folder. Right-click it, choose Get Info, and expand Sharing and Permissions. Make sure your user account has Read and Write access.
If permissions are set to Read Only, click the lock icon, enter your password, and change your account to Read and Write.
-
Sign out of iCloud and back in. Go to System Settings > [Your Name] > scroll down and click Sign Out. Restart your Mac, then sign back in with your Apple ID.
This is a more thorough reset of iCloud permissions and settings on your Mac.
-
Check for a third-party security app. If you use antivirus or a security app like Malwarebytes or CleanMyMac, check its settings. It may be quarantining files or blocking iCloud access.
Temporarily disable the security app to test. If iCloud syncs normally with it disabled, add an exception for iCloud in the security app's settings.
When to Call a Professional
Error 54 is almost always fixable at home by adjusting permissions. If the error continues after granting Full Disk Access and restarting, contact Apple Support. They can check if there is an account-level issue affecting your iCloud sync.
Frequently Asked Questions
What is 'bird' and 'cloudd' in Activity Monitor?
'bird' and 'cloudd' are the background processes that run iCloud sync on your Mac. They work silently in the background, constantly checking for new files and uploading or downloading changes. Force-quitting them is safe — macOS restarts them automatically within seconds.
Why did this error start after a macOS update?
macOS updates sometimes reset app permissions for security reasons. This means apps that previously had Full Disk Access need to be granted it again after the update. This is intentional — Apple requires you to re-approve permissions after major updates.
Can Error 54 cause me to lose files?
In most cases, no. iCloud keeps a copy of your files on Apple's servers and on your Mac. Error 54 means sync is temporarily blocked, but your files are not deleted. Fix the permissions and sync will resume from where it left off.