diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 517907a..e9b58f6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,21 +10,25 @@ jobs:
   ci:
     permissions:
       pull-requests: write
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ macos-12, ubuntu-latest ]
+        version: [ 17, 21 ]
+    runs-on: ${{ matrix.os }}
+    name: ci-${{ matrix.os }}-jdk-${{ matrix.version }}
     steps:
       - uses: actions/checkout@v4
       - name: Set up JDK
         uses: graalvm/setup-graalvm@v1
         with:
-          java-version: '21'      # See 'Options' section below for all supported versions
-          distribution: 'graalvm' # See 'Options' section below for all available distributions
+          java-version: ${{ matrix.version }}
+          distribution: 'graalvm'
       - name: Check Gradle Version
         run: |
           chmod +x gradlew
           ./gradlew --version
-      - name: Install Graphviz
-        run: |
-          sudo apt install -y graphviz
+      - name: Setup Graphviz
+        uses: ts-graphviz/setup-graphviz@v2
       - name: Test
         run: |
           ./gradlew --parallel --max-workers=4 build
@@ -36,13 +40,16 @@ jobs:
         if: success()
         run: |
           JAR_FILE=$(ls -al ./heo-cli/build/libs/ | tail -1 | awk '{print $9}')
-          java -jar ./heo-cli/build/libs/$JAR_FILE -d $(pwd) -p dev.heowc.heo.core -o ${{ github.event.pull_request.number }}.png
+          java -jar ./heo-cli/build/libs/$JAR_FILE \
+              -d $(pwd) \
+              -p dev.heowc.heo.core \
+              -o interg-report.png
       - name: Upload self report file
         if: success() && github.event.pull_request.number != ''
         uses: actions/upload-artifact@v4
         with:
-          path: ${{ github.event.pull_request.number }}.png
-          name: interg-reports
+          path: interg-report.png
+          name: interg-reports-${{ github.event.pull_request.number }}-${{ github.run_id }}-${{ matrix.os }}-jdk-${{ matrix.version }}
           retention-days: 7
 
       - name: If failure then upload test reports
diff --git a/heo-core/src/main/java/dev/heowc/heo/core/visualization/ReportVisualizationService.java b/heo-core/src/main/java/dev/heowc/heo/core/visualization/ReportVisualizationService.java
index 3ed55ec..d557fb7 100644
--- a/heo-core/src/main/java/dev/heowc/heo/core/visualization/ReportVisualizationService.java
+++ b/heo-core/src/main/java/dev/heowc/heo/core/visualization/ReportVisualizationService.java
@@ -2,8 +2,10 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.lang.reflect.Field;
+import java.util.List;
 
-import guru.nidi.graphviz.engine.GraphvizJdkEngine;
+import guru.nidi.graphviz.engine.GraphvizEngine;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -18,6 +20,22 @@ public class ReportVisualizationService {
 
     private static final Logger logger = LoggerFactory.getLogger(ReportVisualizationService.class);
 
+    static {
+        logger.debug("Available engines: {}", detectAvailableEngines());
+    }
+
+    private static List<GraphvizEngine> detectAvailableEngines() {
+        try {
+            Graphviz.useDefaultEngines();
+            final Field field = Graphviz.class.getDeclaredField("availableEngines");
+            field.setAccessible(true);
+            return  (List<GraphvizEngine>) field.get(null);
+        } catch (Throwable e) {
+            logger.debug("Could not detect available engines", e);
+        }
+        return List.of();
+    }
+
     public void createFile(String report, String destination) {
         try {
             final File file = new File(destination);