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Mac Keychain Errors — Password Prompts, Locked Keychain, and Repair Guide

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Overview

Fix macOS Keychain errors including repeated password prompts, locked keychain, Keychain Access repair, and iCloud Keychain sync failures.

Key Details

  • Keychain Access stores passwords, certificates, encryption keys, and secure notes
  • The login keychain should automatically unlock when you log in to your Mac
  • If the login keychain password differs from your user password, macOS prompts repeatedly
  • iCloud Keychain syncs passwords across Apple devices via end-to-end encryption
  • Keychain First Aid (removed in newer macOS) was replaced by the Keychain Access > Preferences repair

Common Causes

  • Login keychain password out of sync with macOS user account password
  • Keychain database corrupted preventing automatic unlock at login
  • iCloud Keychain sync conflict between devices
  • Password changed on another device without updating the keychain
  • Migration from another Mac bringing a keychain with a different password

Steps

  1. 1Update keychain password: Keychain Access > right-click 'login' keychain > Change Password for Keychain
  2. 2Repair keychain: Keychain Access > Keychain Access menu > Keychain First Aid (older macOS) or verify/repair
  3. 3Reset login keychain: Keychain Access > Preferences > Reset My Default Keychains (loses saved passwords)
  4. 4Create a new keychain: Keychain Access > File > New Keychain, then set it as default
  5. 5Fix iCloud Keychain: System Settings > Apple ID > iCloud > toggle Keychain off and on
  6. 6If all else fails: delete ~/Library/Keychains/login.keychain-db and restart (creates a new empty keychain)

Tags

keychainpasswordskeychain-accessicloud-keychainsecurity

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mac-icloud-keychain-error

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Frequently Asked Questions

Your login keychain password does not match your macOS user password. This happens after changing your password from another device or via an admin. Update the keychain password in Keychain Access.