Install Mono on macos-15

Author: jamescrosswell

.github/actions/environment/action.yml

@@ -22,14 +22,29 @@ runs:
       with:
         log-accepted-android-sdk-licenses: false
 
+    # https://github.com/actions/runner-images/issues/10814
+    - name: Workaround build-tools issue
+      if: runner.os == 'macOS'
+      run: |
+        curl https://dl.google.com/android/repository/build-tools_r35_macosx.zip > $ANDROID_HOME/build-tools_r35_macosx.zip
+        cd $ANDROID_HOME
+        mkdir build-tools
+        unzip build-tools_r35_macosx.zip
+        mv android-15 build-tools/35.0.0
+        cd -
+
     - name: Set Java Version
       uses: actions/setup-java@v3
       with:
         distribution: 'temurin'
         java-version: '11'
 
-    # .NET 6 and .NET 8 are not built-in with macos-13
+    - name: Install Mono
+      if: runner.os == 'macOS'
+      run: brew install mono
+
     - name: Install .NET SDK
+      if: runner.os != 'Windows'
       uses: actions/setup-dotnet@v3
       with:
         dotnet-version: |

.github/workflows/build.yml

@@ -123,17 +123,6 @@ jobs:
       - name: Restore .NET Dependencies
         run: dotnet restore Sentry-CI-Build-${{ runner.os }}.slnf --nologo
 
-      # https://github.com/actions/runner-images/issues/10814
-      - name: Workaround build-tools issue
-        if: runner.os == 'macOS'
-        run: |
-          curl https://dl.google.com/android/repository/build-tools_r35_macosx.zip > $ANDROID_HOME/build-tools_r35_macosx.zip
-          cd $ANDROID_HOME
-          mkdir build-tools
-          unzip build-tools_r35_macosx.zip
-          mv android-15 build-tools/35.0.0
-          cd -
-
       - name: Install Android SDKs
         if: runner.os == 'macOS'
         run: |