dnm: build zip with Xcode 26.2 x macOS 26 (#15786)

Author: ncooke3

.github/workflows/release.zip.yml

@@ -22,7 +22,7 @@ env:
   # Firebase's minimum supported Xcode. This is what the binary artifacts are
   # built with. Changing this version must only be done in alignment with
   # updates to the minimum supported Xcode supported for App Store submissions.
-  MIN_XCODE: Xcode_16.2 # WARNING: Read above comment.
+  MIN_XCODE: Xcode_26.2 # WARNING: Read above comment.
 
 on:
   pull_request:
@@ -84,7 +84,7 @@ jobs:
       github.repository == 'firebase/firebase-ios-sdk' &&
       contains(fromJSON('["schedule", "pull_request", "workflow_dispatch"]'), github.event_name) &&
       needs.should_package.outputs.should_package == 'true'
-    runs-on: macos-14
+    runs-on: macos-26
     steps:
     - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       with:
@@ -117,7 +117,7 @@ jobs:
       github.repository == 'firebase/firebase-ios-sdk' &&
       contains(fromJSON('["schedule", "pull_request", "workflow_dispatch"]'), github.event_name) &&
       needs.should_package.outputs.should_package == 'true'
-    runs-on: macos-14
+    runs-on: macos-15
     steps:
     - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       with:
@@ -135,7 +135,7 @@ jobs:
     strategy:
       matrix:
         linking_type: [static, dynamic]
-    runs-on: macos-14
+    runs-on: macos-26
     steps:
     - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       with:
@@ -192,7 +192,7 @@ jobs:
     if: ${{ !cancelled() }}
     env:
       FIREBASECI_USE_LATEST_GOOGLEAPPMEASUREMENT: 1
-    runs-on: macos-14
+    runs-on: macos-15
     steps:
       - name: Xcode
         run: sudo xcode-select -s /Applications/${{ env.MIN_XCODE }}.app/Contents/Developer
@@ -280,8 +280,6 @@ jobs:
           - product: "Database"
             plist_src: "scripts/gha-encrypted/qs-database.plist.gpg"
             plist_dst: "quickstart-ios/database/GoogleService-Info.plist"
-            os: "macos-14" # Override default
-            xcode: "Xcode_16.2" # Override default
             command: |
               SAMPLE="Database" TARGET="DatabaseExample" NON_FIREBASE_SDKS="FirebaseDatabaseUI" \
                 scripts/zip/setup_quickstart_framework.sh \
@@ -349,9 +347,9 @@ jobs:
       product: ${{ matrix.config.product }}
       zip_run_id: ${{ needs.packaging_done.outputs.run_id }}
       artifact_name: ${{ matrix.artifact }}
-      # Use defaults for most, override for Database
+      # Use defaults with option to override
       os: ${{ matrix.config.os || 'macos-15' }}
-      xcode: ${{ matrix.config.xcode || 'Xcode_16.4' }}
+      xcode: ${{ matrix.config.xcode || 'Xcode_26.3' }}
       # Optional scheme (only used by FirebaseAI)
       scheme: ${{ matrix.config.scheme }}
       plist_src_path: ${{ matrix.config.plist_src }}

CONTRIBUTING.md

@@ -119,7 +119,7 @@ the preferred workflow for Firebase development.
 
 To develop Firebase software, **install**:
 
-* [Xcode] (v16.2 or later) (for Googlers, visit [go/xcode](go/xcode)) to
+* [Xcode] (v26.2 or later) (for Googlers, visit [go/xcode](go/xcode)) to
   download.
 * <details>
   <summary>Code styling tools: <b>clang-format</b>, <b>swiftformat</b> and

FirebaseCore/CHANGELOG.md

@@ -1,3 +1,8 @@
+# Unreleased
+- [changed] Firebase now requires at least Xcode 26.2 and the Swift
+  6.2.3+ toolchain. See https://developer.apple.com/news/?id=ueeok6yw for
+  more info.
+
 # Firebase 12.7.0
 - [fixed] [CocoaPods] Enable module map generation for Firebase pods. This
   resolves build failures when using static linking

README.md

@@ -86,7 +86,7 @@ For details on using Firebase from a Framework or a library, refer to [firebase_
 To develop Firebase software in this repository, ensure that you have at least
 the following software:
 
-* Xcode 16.2 (or later)
+* Xcode 26.2 (or later)
 
 CocoaPods is still the canonical way to develop, but much of the repo now supports
 development with Swift Package Manager.

ReleaseTooling/Template/README.md

@@ -19,7 +19,7 @@ Each Firebase component requires several xcframeworks in order to function
 properly. Each section below lists the xcframeworks you'll need to include
 in your project in order to use that Firebase SDK in your application.
 
-Xcode 16.2 or newer is required.
+Xcode 26.2 or newer is required.
 
 To integrate a Firebase SDK with your app:
 

SwiftPackageManager.md

@@ -2,7 +2,7 @@
 
 ## Requirements
 
-- Requires Xcode 16.2 or above
+- Requires Xcode 26.2 or above
 - Analytics requires clients to add `-ObjC` linker option.
 - See [Package.swift](Package.swift) for supported platform versions.
 

agents.md

@@ -12,7 +12,7 @@ following setup is beneficial.
 
 ### Prerequisites
 
-1.  **Xcode**: The development environment relies on Xcode 16.2 or above.
+1.  **Xcode**: The development environment relies on Xcode 26.2 or above.
 2.  **Command-Line Tools**:
     *   `clang-format`: Used for C, C++, and Objective-C code formatting. Version 20 is
         specifically mentioned.