diff --git a/.github/actions/build-macos/action.yml b/.github/actions/build-macos/action.yml
index c771d455..45be156e 100644
--- a/.github/actions/build-macos/action.yml
+++ b/.github/actions/build-macos/action.yml
@@ -101,13 +101,14 @@ runs:
         brew install create-dmg
         create-dmg \
           --volname "Techmino for MacOS" \
-          --volicon "./.github/build/macOS/icon.icns" \
+          --volicon "./.github/build/macOS/Techminodisk.icns" \
           --window-pos 200 120 \
-          --window-size 800 400 \
+          --window-size 800 456 \
           --icon-size 100 \
-          --icon "Techmino.app" 200 190 \
+          --icon "Techmino.app" 239 203 \
+          --background ".github/build/macOS/backgroundImage.tiff" \
           --hide-extension "Techmino.app" \
-          --app-drop-link 600 185 \
+          --app-drop-link 565 203 \
           "Techmino-macOS/Techmino-macOS.dmg" \
           "Techmino-macOS/Techmino.app/"
     - name: Codesign DMG
diff --git a/.github/build/macOS/Techminodisk.icns b/.github/build/macOS/Techminodisk.icns
new file mode 100644
index 00000000..f1a560cb
Binary files /dev/null and b/.github/build/macOS/Techminodisk.icns differ
diff --git a/.github/build/macOS/backgroundImage.tiff b/.github/build/macOS/backgroundImage.tiff
new file mode 100644
index 00000000..9cbf589a
Binary files /dev/null and b/.github/build/macOS/backgroundImage.tiff differ