macOS Diagnostics Hub

macOS Digital Signature & Keychain Diagnostics

macOS signing problems usually live in the Keychain identity-preference layer or in the CryptoTokenKit / SmartCardServices stack. We trace the request through each layer and identify exactly where the handoff breaks.

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Symptoms we triage

Keychain Access does not show smart-card certificates
Safari does not prompt for client certificate
Acrobat on macOS marks signature invalid
DocuSign in-person signing fails on MacBook
Token works after reboot but breaks within hours

Diagnostic flow

1. List smart-card identities
sc_auth identities
Expected: Card certificates with hashes
2. Pair card to a user
sc_auth pair -u user -h <hash>
Expected: Pairing completes without error
3. Inspect SmartCardServices log
log show --predicate 'subsystem == "com.apple.CryptoTokenKit"' --last 1h
Expected: Token registration events present

OS coverage

macOS Sonoma / Sequoia

• macOS Sonoma 14.x signing behaviour
• macOS Sequoia 15.x privacy & TCC prompts
• CryptoTokenKit extension registration

Frequently asked

Do you support Apple silicon (M1–M4)?

Yes. All diagnostics cover Apple silicon and Intel Macs on supported macOS versions.

Ready for a structured macOS diagnostic?

Independent consulting, screen-shared Zoom session, written remediation summary.

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