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iCloud Not Syncing? How to Fix It

Updated March 2026 · Covers iPhone, iPad, Mac, Windows

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1. Quick First Checks

Run through these basics first

  1. Check Apple's system status at appleid.apple.com/status or apple.com/support/systemstatus — all iCloud services should show a green indicator.
  2. Ensure you're on Wi-Fi (iCloud Photos and Drive won't sync on cellular data by default).
  3. Turn off Low Power Mode: Settings → Battery → Low Power Mode (off). This feature throttles iCloud sync.
  4. Check the date & time: Settings → General → Date & Time → Set Automatically (on). Wrong time breaks iCloud authentication.
  5. Restart your iPhone/iPad: power off and on again.

2. iCloud Photos Not Syncing

iPhone / iPad

  1. Go to Settings → [Your Name] → iCloud → Photos.
  2. Make sure iCloud Photos is toggled ON.
  3. Open the Photos app → scroll to the bottom — you should see a sync status bar. Wait for it to complete.
  4. If paused, tap "Resume". If it's been paused more than an hour on Wi-Fi, toggle iCloud Photos off and back on.

Mac

  1. Open the Photos app → click the status bar at the bottom. It should say "Uploading X items" or "Up to Date".
  2. If it says "Paused", choose Photos → Settings → iCloud and click Resume.
  3. Ensure your Mac is plugged in — macOS may pause uploads on battery.

3. Contacts & Notes Not Syncing

iPhone / iPad

Enable iCloud Contacts and Notes

  1. Settings → [Your Name] → iCloud → Show All.
  2. Toggle Contacts ON (and Notes if you use iCloud Notes).
  3. If the toggle is already on, try turning it off → keep on my device (or merge) → wait 30 seconds → turn back on.
Tip: If contacts appear duplicated after re-enabling, go to icloud.com → Contacts → select duplicates → Delete. Then merge any remaining duplicates using Settings → Contacts → Merge Contacts (iOS 16+).

4. iCloud Drive Not Updating

  1. Open the Files app on iPhone → tap the three-dot menu → Refresh.
  2. On Mac, open Finder → iCloud Drive → right-click → Get Info to see sync status. If stuck, sign out and back in.
  3. Check that iCloud Drive is enabled: Settings → [Your Name] → iCloud → iCloud Drive → toggle ON.

5. iCloud Not Syncing on Mac

Fix iCloud sync on macOS

  1. Open System Settings → Apple ID → iCloud (macOS Ventura or later) or System Preferences → Apple ID.
  2. Check which services have their checkboxes ticked. Tick any that should be syncing.
  3. If the iCloud Drive shows a spinning wheel in Finder, quit Finder (Option + right-click Finder → Relaunch) and reopen.
  4. Sign out of iCloud: System Settings → Apple ID → Sign Out. Choose to keep local copies of iCloud data. Then sign back in.

6. iCloud Not Syncing on Windows

  1. Open iCloud for Windows from the Start menu. Ensure all services you need are checked and the app shows "iCloud Drive is up to date".
  2. Update iCloud for Windows to the latest version in the Microsoft Store.
  3. Restart the iCloud service: open Task Manager → Details tab → find iCloudServices.exe → End Task → reopen iCloud for Windows.
  4. Ensure Windows Defender or your antivirus isn't blocking iCloud — add an exception for the iCloud folder if needed.

7. Sign Out and Back In to iCloud (Full Reset)

Force iCloud to re-establish sync

  1. On iPhone/iPad: Settings → [Your Name] → scroll down → Sign Out. Keep a local copy when prompted.
  2. Wait 60 seconds, then: Settings → Sign In → enter your Apple ID.
  3. Re-enable iCloud services: Settings → [Your Name] → iCloud → turn on each service you use.
  4. Connect to Wi-Fi and allow time for initial sync (can take 15–60 minutes for large libraries).
Warning: Signing out of iCloud does NOT delete your iCloud data — it's safely stored in the cloud. Your data will re-download after you sign back in.

8. iCloud Storage Full