Pin the mac runners to 12 (#1003)

Author: a-maurice

.github/workflows/build_android.yml

@@ -38,7 +38,7 @@ on:
 jobs:
   build_android:
     name: build-android-unity${{ inputs.unity_version }}-CPP${{ inputs.firebase_cpp_sdk_version }}
-    runs-on: macos-latest
+    runs-on: macos-12
     strategy:
       fail-fast: false
     env:

.github/workflows/build_macos.yml

@@ -38,7 +38,7 @@ on:
 jobs:
   build_desktop:
     name: build-macOS-unity${{ inputs.unity_version}}-CPP${{ inputs.firebase_cpp_sdk_version }}
-    runs-on: macos-latest
+    runs-on: macos-12
     strategy:
       fail-fast: false
 

scripts/gha/print_matrix_configuration.py

@@ -56,7 +56,7 @@
 
 # GitHub Runner
 WINDOWS_RUNNER = "windows-latest"
-MACOS_RUNNER = "macos-latest"
+MACOS_RUNNER = "macos-12"
 LINUX_RUNNER = "ubuntu-latest"
 
 PARAMETERS = {