diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 836c783..9f9a949 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -23,7 +23,7 @@ on:
 
 jobs:
   macos:
-    runs-on: macos-12
+    runs-on: macos-13
 
     steps:
       - uses: actions/checkout@v4
diff --git a/build_dmg.sh b/build_dmg.sh
index 7a47985..ab30217 100755
--- a/build_dmg.sh
+++ b/build_dmg.sh
@@ -34,7 +34,7 @@ cp $OPENCV_DIR/lib/libopencv_imgproc.4.0.dylib ./YUVviewer.app/Contents/Framewor
 cp $OPENCV_DIR/lib/libopencv_imgcodecs.4.0.dylib ./YUVviewer.app/Contents/Frameworks/libopencv_imgcodecs.4.0.dylib
 cp $OPENCV_DIR/lib/libopencv_core.4.0.dylib ./YUVviewer.app/Contents/Frameworks/libopencv_core.4.0.dylib
 otool -L ./YUVviewer.app/Contents/MacOS/YUVviewer
-./build-dmg.sh YUVviewer
+sudo ./build-dmg.sh YUVviewer
 cd ../../
 mkdir dmgOut
 cpu=$(sysctl -n machdep.cpu.brand_string)