Sign In With Apple Fix Recipe Final Verified

Concept Search related

User: "I can't sign in with Apple." xcode console: AKAuthenticationError Code=-7026 + LaunchServices Code=-54 "process may not map database". User rejected device-side fixes ("I'm not going to sign out and back in to my apple id"). Fix: add Sign in with Apple capability in Xcode + add NSAppleSignInUsageDescription to Info.plist. Result: works.

The actual root cause was a 1-minute user-side fix (Xcode "Capabilities → + → Sign in with Apple"). None of the 8 commits would have fixed it. The 8 commits worked around the missing capability (each happened to also work in the specific env where AuthKit's degraded path granted ad-hoc permission), but they did not address the underlying LaunchServices -54.

The user had a working iOS app, deployed to App Store / TestFlight or running in dev. They added Sign in with Apple functionality to the codebase (per the MVP Slice 1 commit 7783eaf: AppleSignInDelegate class + signInWithAppleInline() method), but DIDN'T add the Sign in with Apple capability to the Xcode target's Signing & Capabilities.

The lesson (per first-attempt-bug-cascade-pattern + Honestly verification reports): when the same symptom (sign-in failure) persists across N commits, STOP and ask the user for the xcode console output. The console disambiguates between the 3 layers (bundle ID / Apple Developer portal / entitlement / Info.plist) in a single grep.

How it's structured

  1. The pattern User: "I can't sign in with Apple." xcode console: AKAuthenticationError Code=-7026 + `LaunchServices Code=-54 "process may not map databa…
  2. Verified 2026-06-25 (this session) After the fix landed: issue (the user is now asking to focus on it)
  3. What was the user's mistake (per `Honestly verification reports`) The user had a working iOS app, deployed to App Store / TestFlight or running in dev. They added Sign in with Apple functionality to the cod…
  4. What was the user's mistake (per `Honestly verification reports`) The first sign-in worked because:
  5. What was the user's mistake (per `Honestly verification reports`) Subsequent sign-ins (after signOut) failed because: Apple capability association returned -7026 from LaunchServices
  6. What I got wrong in the cascade (per `Honestly verification reports` + `first-attempt-bug-cascade-pattern`) Across the 2026-06-24 + 2026-06-25 Felt Faction build session, I produced ~6 sign-in-related commits before the actual root cause (LaunchSer…
  7. … 9 more sections in the full essay

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