diff --git a/scripts/create-dmg.sh b/scripts/create-dmg.sh
new file mode 100644
index 0000000..9d3ac04
--- /dev/null
+++ b/scripts/create-dmg.sh
@@ -0,0 +1,72 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Create a distributable DMG for the macOS Tetris app
+# Usage: ./scripts/create-dmg.sh <app-bundle-path> <output-dmg>
+# Example: ./scripts/create-dmg.sh dist/TetrisGame-mac/tetris.app dist/TetrisGame.dmg
+
+if [[ $# -lt 2 ]]; then
+    echo "Usage: $0 <app-bundle-path> <output-dmg>"
+    echo "Example: $0 dist/TetrisGame-mac/tetris.app dist/TetrisGame.dmg"
+    exit 1
+fi
+
+APP_BUNDLE="$1"
+OUTPUT_DMG="$2"
+
+if [[ ! -d "$APP_BUNDLE" ]]; then
+    echo "Error: App bundle not found at $APP_BUNDLE" >&2
+    exit 1
+fi
+
+if [[ ! "$APP_BUNDLE" =~ \.app$ ]]; then
+    echo "Error: First argument must be a .app bundle" >&2
+    exit 1
+fi
+
+# Remove existing DMG if present
+rm -f "$OUTPUT_DMG"
+
+APP_NAME=$(basename "$APP_BUNDLE" .app)
+VOLUME_NAME="$APP_NAME"
+TEMP_DMG="${OUTPUT_DMG%.dmg}-temp.dmg"
+
+echo "[create-dmg] Creating temporary DMG..."
+# Create a temporary read-write DMG (generous size to fit the app + padding)
+hdiutil create -size 200m -fs HFS+ -volname "$VOLUME_NAME" "$TEMP_DMG"
+
+echo "[create-dmg] Mounting temporary DMG..."
+MOUNT_DIR=$(hdiutil attach "$TEMP_DMG" -nobrowse | grep "/Volumes/$VOLUME_NAME" | awk '{print $3}')
+
+if [[ -z "$MOUNT_DIR" ]]; then
+    echo "Error: Failed to mount temporary DMG" >&2
+    exit 1
+fi
+
+echo "[create-dmg] Copying app bundle to DMG..."
+cp -R "$APP_BUNDLE" "$MOUNT_DIR/"
+
+# Create Applications symlink for drag-and-drop installation
+echo "[create-dmg] Creating Applications symlink..."
+ln -s /Applications "$MOUNT_DIR/Applications"
+
+# Set custom icon if available
+VOLUME_ICON="$APP_BUNDLE/Contents/Resources/AppIcon.icns"
+if [[ -f "$VOLUME_ICON" ]]; then
+    echo "[create-dmg] Setting custom volume icon..."
+    cp "$VOLUME_ICON" "$MOUNT_DIR/.VolumeIcon.icns"
+    SetFile -c icnC "$MOUNT_DIR/.VolumeIcon.icns" 2>/dev/null || true
+fi
+
+# Unmount
+echo "[create-dmg] Ejecting temporary DMG..."
+hdiutil detach "$MOUNT_DIR"
+
+# Convert to compressed read-only DMG
+echo "[create-dmg] Converting to compressed DMG..."
+hdiutil convert "$TEMP_DMG" -format UDZO -o "$OUTPUT_DMG"
+
+# Cleanup
+rm -f "$TEMP_DMG"
+
+echo "[create-dmg] Created: $OUTPUT_DMG"