diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 0c0a301cf2..b1694d324b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -193,6 +193,7 @@ jobs:
     - name: CMake Generate
       shell: bash
       run: |
+        EXTENDED_BUILD_CONFIG=""
         if [ "${{ env.IS_EXTENDED_BUILD }}" == "true" ]; then
           if [ "${{ runner.os }}" == "Windows" ]; then
             EXTENDED_BUILD_CONFIG="-DCMAKE_TOOLCHAIN_FILE=C:/vcpkg/scripts/buildsystems/vcpkg.cmake -DVCPKG_TARGET_TRIPLET=x64-windows"
@@ -204,7 +205,14 @@ jobs:
             EXTENDED_BUILD_CONFIG="$EXTENDED_BUILD_CONFIG -DMATERIALX_MDL_SDK_DIR=C:/vcpkg/installed/x64-windows"
           fi
         fi
-        cmake -S . -B build -DMATERIALX_BUILD_PYTHON=ON -DMATERIALX_BUILD_VIEWER=ON -DMATERIALX_BUILD_GRAPH_EDITOR=ON -DMATERIALX_BUILD_TESTS=ON -DMATERIALX_TEST_RENDER=OFF -DMATERIALX_WARNINGS_AS_ERRORS=ON $EXTENDED_BUILD_CONFIG ${{matrix.cmake_config}}
+        TEST_RENDER_CONFIG="-DMATERIALX_TEST_RENDER=OFF"
+        if [ "${{ matrix.test_render }}" == "ON" ]; then
+          if [ "${{ runner.os }}" == "macOS" ]; then
+            TEST_RENDER_CONFIG="-DMATERIALX_TEST_RENDER=ON -DMATERIALX_RENDER_MSL_ONLY=ON"
+          fi
+        fi
+        EXTENDED_BUILD_CONFIG="$EXTENDED_BUILD_CONFIG $TEST_RENDER_CONFIG" 
+        cmake -S . -B build -DMATERIALX_BUILD_PYTHON=ON -DMATERIALX_BUILD_VIEWER=ON -DMATERIALX_BUILD_GRAPH_EDITOR=ON -DMATERIALX_BUILD_TESTS=ON -DMATERIALX_WARNINGS_AS_ERRORS=ON $EXTENDED_BUILD_CONFIG ${{matrix.cmake_config}}
 
     - name: CMake Build
       run: cmake --build build --target install --config Release --parallel 2
@@ -332,6 +340,13 @@ jobs:
         name: Renders_${{ matrix.name }}
         path: build/render/*.png
 
+    - name: Upload Resources (MacOS)
+      uses: actions/upload-artifact@v4
+      if: matrix.test_render == 'ON' && runner.os == 'macOS'
+      with:
+        name: Resources_${{ matrix.name }}
+        path: build/bin/resources
+
     - name: Upload Coverage Report
       uses: actions/upload-artifact@v4
       if: matrix.coverage_analysis == 'ON'
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a4bba653b7..357270cc89 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -45,6 +45,7 @@ option(MATERIALX_BUILD_GEN_MSL "Build the MSL shader generator back-end." ON)
 option(MATERIALX_BUILD_GEN_SLANG "Build the Slang shader generator back-end." ON)
 option(MATERIALX_BUILD_RENDER "Build the MaterialX Render modules." ON)
 option(MATERIALX_BUILD_RENDER_PLATFORMS "Build platform-specific render modules for each shader generator." ON)
+option(MATERIALX_RENDER_MSL_ONLY "On macOS, use Metal Shading Language only for tests and viewer (skips GLSL render tests)." OFF)
 option(MATERIALX_BUILD_OIIO "Build OpenImageIO support for MaterialXRender." OFF)
 option(MATERIALX_BUILD_OCIO "Build OpenColorIO support for shader generators." OFF)
 option(MATERIALX_BUILD_TESTS "Build unit tests." OFF)
@@ -112,6 +113,17 @@ if (MATERIALX_BUILD_JS)
     set(MATERIALX_BUILD_TESTS OFF)
 endif()
 
+# Validate MSL-only rendering option
+if(MATERIALX_RENDER_MSL_ONLY)
+    if(NOT APPLE)
+        message(FATAL_ERROR "MATERIALX_RENDER_MSL_ONLY can only be enabled on Apple platforms")
+    endif()
+    if(NOT MATERIALX_BUILD_GEN_MSL)
+        message(FATAL_ERROR "MATERIALX_RENDER_MSL_ONLY requires MATERIALX_BUILD_GEN_MSL to be enabled")
+    endif()
+    message(STATUS "MSL-only testing mode enabled - MaterialXTest will not link MaterialXRenderGlsl")
+endif()
+
 # All hardware shading languages currently depend on the GLSL shader generator.
 if(MATERIALX_BUILD_GEN_MSL)
     set(MATERIALX_BUILD_GEN_GLSL ON)
@@ -178,6 +190,7 @@ mark_as_advanced(MATERIALX_BUILD_GEN_MSL)
 mark_as_advanced(MATERIALX_BUILD_OSOS)
 mark_as_advanced(MATERIALX_BUILD_RENDER)
 mark_as_advanced(MATERIALX_BUILD_RENDER_PLATFORMS)
+mark_as_advanced(MATERIALX_RENDER_MSL_ONLY)
 mark_as_advanced(MATERIALX_BUILD_OIIO)
 mark_as_advanced(MATERIALX_BUILD_OCIO)
 mark_as_advanced(MATERIALX_BUILD_BENCHMARK_TESTS)
diff --git a/source/MaterialXTest/CMakeLists.txt b/source/MaterialXTest/CMakeLists.txt
index 1825420d51..1da03b9060 100644
--- a/source/MaterialXTest/CMakeLists.txt
+++ b/source/MaterialXTest/CMakeLists.txt
@@ -69,7 +69,7 @@ endif()
 if(MATERIALX_BUILD_RENDER)
   add_subdirectory(MaterialXRender)
   target_link_libraries(MaterialXTest MaterialXRender)
-  if(MATERIALX_BUILD_GEN_GLSL)
+  if(MATERIALX_BUILD_GEN_GLSL AND NOT MATERIALX_RENDER_MSL_ONLY)
     add_subdirectory(MaterialXRenderGlsl)
     target_link_libraries(MaterialXTest MaterialXRenderGlsl)
   endif()
diff --git a/source/MaterialXView/CMakeLists.txt b/source/MaterialXView/CMakeLists.txt
index f9f9eb256c..0bbad1ebef 100644
--- a/source/MaterialXView/CMakeLists.txt
+++ b/source/MaterialXView/CMakeLists.txt
@@ -11,7 +11,12 @@ if(APPLE)
       set(USE_OPENGL_BACKEND_ON_APPLE_PLATFORM ON)
     endif()
     
-    if(USE_OPENGL_BACKEND_ON_APPLE_PLATFORM)
+    # Force Metal backend if MSL-only rendering is enabled
+    if(MATERIALX_RENDER_MSL_ONLY)
+        set(USE_OPENGL_BACKEND_ON_APPLE_PLATFORM OFF)
+        set(NANOGUI_PREFERRED_BACKEND Metal)
+        set(MATERIALXVIEW_RENDER_BACKEND_DEFINITIONS "-DMATERIALXVIEW_METAL_BACKEND=1")
+    elseif(USE_OPENGL_BACKEND_ON_APPLE_PLATFORM)
         set(NANOGUI_PREFERRED_BACKEND OpenGL)
 	set(MATERIALXVIEW_RENDER_BACKEND_DEFINITIONS "-DMATERIALXVIEW_OPENGL_BACKEND=1")
     else()