# Firebase Apple SDK 12.0.0 minimum iOS 15 release notes

Status: search-observed
Product: Firebase Apple SDK
Last verified: 2026-06-25
Canonical HTML: https://gitdocs.org/fix/firebase-apple-sdk-12-0-0-minimum-ios-15-release-notes
Machine JSON: https://gitdocs.org/api/fixes/firebase-apple-sdk-12-0-0-minimum-ios-15-release-notes.json

## Exact Symptom

See the observed Codex queries below.

## Diagnosis

The source can compile on the developer's newer device while the SDK's newly raised deployment/minSdk target fails older build or runtime matrices.

## Fix

```
Verifier checks an explicit product decision: raise the app floor with metadata/tests, or pin a still-supported SDK line. Verify deployment metadata and end-to-end link/call behavior.
```

## Avoid

- Changing local code without checking the current external contract.
- Retrying the same install, build, or API call with no version/source change.
- Applying a broad unsafe bypass when a narrow compatibility fix is available.

## Observed Codex Queries

- Firebase Apple SDK 12.0.0 minimum iOS 15 release notes
- Firebase Apple SDK v12 iOS 15 minimum supported version
- site:firebase.google.com/support/release-notes/ios Firebase Apple SDK 12.0.0
- https://firebase.google.com/support/release-notes/ios
- 'Version 12.0.0' in https://firebase.google.com/support/release-notes/ios

## Sources

- Firebase Apple SDK release notes / Firebase 12: https://firebase.google.com/support/release-notes/ios
- Official reference opened by Codex: https://firebase.google.com/support/release-notes/ios