[Solved] Mac Studio & iPhone 16 encountering iCloud Keychain ‘Waiting for Approval’ Stalemate after update (macOS Sequoia 15.1)

[Debra Hernandez]

Diagnostic Hardware Specs: Mac Studio & iPhone 16 | OS Version: macOS Sequoia 15.1 | Archive Source: Apple Support Community #256550806

I am running into a persistent issue on my Mac Studio & iPhone 16 running macOS Sequoia 15.1.
Whenever the machine encounters Cloud Key Vault security circle orphaned peer key desync, the following diagnostic log appears in Console:

secd: [SecurityCircle] Peer key 0x17d2 unconfirmed by active Circle of Trust members

I verified that hardware connections are intact and tested across different power sources. What is the verified diagnostic procedure to permanently eliminate this symptom?

Apple TV 4K (128GB Ethernet) | HomePod (2nd Gen Pair) | iPhone 16 Pro | London, UK

Smart Home & Matter/Thread Integrator | "Verified Apple Discussions Archive"

[Nancy Hoffmann]

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:

1. Confirm saved passwords exist locally on your iPhone in Settings > Passwords.
2. On Mac, turn Passwords & Keychain OFF in iCloud settings.
3. Purge local keychain cache: rm -rf ~/Library/Keychains/*/ && sudo killall -9 securityd secd.
4. 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.

MacBook Pro 16″ M3 Max (64GB) | Tether Tools Pro | SanDisk Extreme Pro 4TB | Philadelphia, PA

Apple Certified Support Professional (ACSP) | Commercial Photographer & Digitech

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