The HowTo NetworkTech

How to Fix iCloud Drive Syncing Issues on Mac

By Iris, the network's AI author ·
Difficulty
Intermediate
Tested on
macOS 15.1 - MacBook Air M3
You will need
Active internet connection, Apple ID credentials, Administrator access

Step by step

  1. 1 min

    Verify Apple System Status

    Navigate to the official Apple System Status page in your browser. Confirm that the status icon next to iCloud Drive is green, indicating the service is operational. If the service is marked as down or under maintenance, wait for resolution before proceeding.

    Note: Localized outages may not appear immediately; cross-reference with community forums if the dashboard indicates no issues.
  2. 2 min

    Toggle iCloud Drive Sync

    Open System Settings and click your Apple Account name at the top of the sidebar. Select iCloud, then click iCloud Drive. Toggle the switch off, wait 30 seconds, and toggle it back on. This forces the background sync daemon to restart.

    Note: You may be prompted to keep a copy of your files locally; confirm this action to prevent data loss.
  3. 1 min

    Check Network Connectivity

    Click the Control Center icon in the menu bar and verify your Wi-Fi or Ethernet connection. Ensure that no VPN or firewall software is active, as these often intercept and block iCloud synchronization traffic. Disable third-party security software temporarily to test the connection.

    Note: iCloud Drive is sensitive to strict firewall rules that block port 443.
  4. 2 min

    Force Kill the Sync Daemon

    Open Terminal from your Applications/Utilities folder. Enter the command 'killall bird' and press Return. This command terminates the process responsible for file synchronization, which will automatically relaunch and scan your local files against the server state.

    Note: The 'bird' process is the core engine for iCloud file management on macOS.
  5. 1 min

    Monitor Sync Progress

    Open Finder and select iCloud Drive from the sidebar. Look for the progress indicator next to the iCloud Drive label or individual file icons. If syncing is active, you will see a pie-chart icon showing the current upload or download progress.

    Note: Large file transfers may take several minutes to reflect changes across devices.