Fix nightlies (#14560)

Author: paulb777

.github/workflows/firebase_app_check.yml

@@ -157,6 +157,9 @@ jobs:
         key: ${{needs.spm-package-resolved.outputs.cache_key}}
     - name: Xcode
       run: sudo xcode-select -s /Applications/${{ matrix.xcode }}.app/Contents/Developer
+    - name: Install visionOS, if needed.
+      if: matrix.target == 'visionOS spm'
+      run: xcodebuild -downloadPlatform visionOS
     - name: Initialize xcodebuild
       run: scripts/setup_spm_tests.sh
     - name: Unit Tests

.github/workflows/release.yml

@@ -74,7 +74,7 @@ jobs:
     needs: specs_checking
     # Don't run on private repo unless it is a PR.
     if: github.repository == 'Firebase/firebase-ios-sdk'
-    runs-on: macos-14
+    runs-on: macos-15
     env:
       bot_token_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       local_repo: specsreleasing
@@ -111,7 +111,7 @@ jobs:
     needs: [buildup_SpecsReleasing_repo_FirebaseCore, specs_checking]
     # Don't run on private repo unless it is a PR.
     if: github.repository == 'Firebase/firebase-ios-sdk' || github.event_name == 'workflow_dispatch'
-    runs-on: macos-14
+    runs-on: macos-15
     strategy:
       fail-fast: false
       matrix: ${{fromJson(needs.specs_checking.outputs.matrix)}}