Apple Recommended / Verified Community Solution
This canonical solution was verified and marked as solved in the Apple Support Community archive.
Flushing local keychain daemon caches and re-authenticating with primary device lock screen passcode.
Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:
- Confirm saved passwords exist locally on your iPhone in Settings > Passwords.
- On Mac, turn Passwords & Keychain OFF in iCloud settings.
- Purge local keychain cache:
rm -rf ~/Library/Keychains/*/ && sudo killall -9 securityd secd.
- Re-enable Keychain in iCloud settings and verify identity with iPhone lock screen passcode.
Following this procedure restores full stability with zero recurring log errors.
Mac Studio M2 Max (32GB) | EIZO ColorEdge CG279X | Wacom Intuos Pro | Antwerp, BE
Apple Certified Support Professional (ACSP) | Commercial Photographer & Digitech
