Update build-and-test.yml

Author: JimBobSquarePants

.github/workflows/build-and-test.yml

@@ -25,7 +25,7 @@ jobs:
             sdk-preview: true
             runtime: -x64
             codecov: false
-          - os: macos-13 # macos-latest runs on arm64 runners where libgdiplus is unavailable
+          - os: macos-26
             framework: net7.0
             sdk: 7.0.x
             sdk-preview: true
@@ -48,7 +48,7 @@ jobs:
             sdk: 6.0.x
             runtime: -x64
             codecov: false
-          - os: macos-13 # macos-latest runs on arm64 runners where libgdiplus is unavailable
+          - os: macos-26 
             framework: net6.0
             sdk: 6.0.x
             runtime: -x64
@@ -69,8 +69,20 @@ jobs:
       - name: Install libgdi+, which is required for tests running on ubuntu
         if: ${{ contains(matrix.options.os, 'ubuntu') }}
         run: |
-            sudo apt-get update
-            sudo apt-get -y install libgdiplus libgif-dev libglib2.0-dev libcairo2-dev libtiff-dev libexif-dev
+          sudo apt-get update
+          sudo apt-get -y install libgdiplus libgif-dev libglib2.0-dev libcairo2-dev libtiff-dev libexif-dev
+
+      - name: Install libgdi+, which is required for tests running on macos
+        if: ${{ contains(matrix.options.os, 'macos-26') }}
+        run: |
+          brew update
+          brew install mono-libgdiplus
+          # Create symlinks to make libgdiplus discoverable
+          sudo mkdir -p /usr/local/lib
+          sudo ln -sf $(brew --prefix)/lib/libgdiplus.dylib /usr/local/lib/libgdiplus.dylib
+          # Verify installation
+          ls -la $(brew --prefix)/lib/libgdiplus* || echo "libgdiplus not found in brew prefix"
+          ls -la /usr/local/lib/libgdiplus* || echo "libgdiplus not found in /usr/local/lib"
 
       - name: Git Config
         shell: bash