iCloud Keychain Not Syncing — Passwords Missing Across Apple Devices

Fix iCloud Keychain sync issues where saved passwords, credit cards, and WiFi passwords are not appearing across Mac, iPhone, and iPad. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: iCloud Keychain syncs passwords, credit cards, WiFi networks, and passkeys across Apple devices. Keychain sync uses end-to-end encryption — Apple cannot read your passwords. New devices must be approved before receiving Keychain data (via another device or security code). iCloud Keychain and the Passwords app (macOS Sequoia+) share the same underlying data. Two-factor authentication must be enabled on the Apple ID for Keychain sync to work. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: iCloud Keychain disabled on one or more devices. New device not yet approved for Keychain sync by an existing trusted device. Two-factor authentication not enabled on the Apple ID. Keychain sync interrupted during setup and left in a partially configured state. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Enable Keychain sync: System Settings > Apple ID > iCloud > Passwords & Keychain > toggle on. Ensure two-factor authentication is enabled: System Settings > Apple ID > Sign-In & Security. Approve the device from another trusted device when prompted. Toggle Keychain off on all devices, wait 1 minute, toggle back on (forces re-sync). Check that the Passwords app or Keychain Access shows the same entries on all devices. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Mac Error Codes collection on Error Codes Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.