What causes "Some iCloud Data Isn't Syncing on Mac Passwords"?

iCloud/CloudKit verification errors Resetting sync can worsen it

How do I fix "Some iCloud Data Isn't Syncing on Mac Passwords"?

1. Toggle and restart: Turn off iCloud Passwords & Keychain sync Restart the Mac Turn it on 2. Last resort: Reinstall macOS over the existing system (reported by Michael Tsai)

Some iCloud Data Isn't Syncing on Mac Passwords

Ongoing macOS Updated November 15, 2026Based on 2 user reportsHow we research

Quick answer

Turn iCloud Passwords & Keychain sync off, restart and on again; in a severe 2026 case only a macOS reinstall over the system fixed it.

Most likely fix: Toggle and restart

How to fix it

Try these in order — the most common fix is first.

1. Toggle and restart
1. Turn off iCloud Passwords & Keychain sync
2. Restart the Mac
3. Turn it on
Did this fix it?
2. Last resort
1. Reinstall macOS over the existing system (reported by Michael Tsai)
Did this fix it?

Symptoms

Mac shows a sync error and passwords stay stale.

Why it happens

iCloud/CloudKit verification errors
Resetting sync can worsen it

This guide also covers

some icloud data isn't syncing
icloud keychain mac not syncing

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