diff --git a/.gitignore b/.gitignore
index 378eac2..9f9ca98 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-build
+build/
+build-universal/
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f7890ed..9efc4b1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,6 +5,12 @@ project(adhd VERSION 1.0.0 LANGUAGES CXX)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
+# Set minimum macOS version
+# Qt 6.8.6 requires macOS 11.0 (Big Sur) minimum
+if(APPLE)
+    set(CMAKE_OSX_DEPLOYMENT_TARGET "11.0" CACHE STRING "Minimum macOS version")
+endif()
+
 find_package(Qt6 REQUIRED COMPONENTS
         Core
         Gui
diff --git a/build-universal.sh b/build-universal.sh
new file mode 100755
index 0000000..9246a3f
--- /dev/null
+++ b/build-universal.sh
@@ -0,0 +1,141 @@
+#!/bin/bash
+
+# Build script for universal macOS bundle (arm64 + x86_64)
+
+set -e  # Exit on error
+
+echo "========================================="
+echo "Building Universal macOS Bundle for adhd"
+echo "========================================="
+
+# Configuration
+APP_NAME="adhd"
+BUILD_DIR="build-universal"
+BUILD_TYPE="Release"
+ARCHITECTURES="arm64;x86_64"
+QT_PATH="$HOME/Qt/6.8.6/macos"
+APPLE_DEVELOPMENT_IDENTITY="Developer ID Application: Arjun Patel (RK9WWM4Q99)"
+
+# Clean previous build (optional - comment out to keep incremental builds)
+# rm -rf "$BUILD_DIR"
+
+# Configure CMake
+echo ""
+echo "Configuring CMake for universal binary..."
+echo "Minimum macOS version: 11.0 (Big Sur)"
+cmake -B "$BUILD_DIR" \
+    -DCMAKE_OSX_ARCHITECTURES="$ARCHITECTURES" \
+    -DCMAKE_OSX_DEPLOYMENT_TARGET="11.0" \
+    -DCMAKE_PREFIX_PATH="$QT_PATH" \
+    -DCMAKE_BUILD_TYPE="$BUILD_TYPE"
+
+# Build
+echo ""
+echo "Building..."
+cmake --build "$BUILD_DIR" --config "$BUILD_TYPE" -j$(sysctl -n hw.ncpu)
+
+# Verify the binary is universal
+echo ""
+echo "Verifying binary architectures..."
+if [ -f "$BUILD_DIR/$APP_NAME.app/Contents/MacOS/$APP_NAME" ]; then
+    lipo -info "$BUILD_DIR/$APP_NAME.app/Contents/MacOS/$APP_NAME"
+    echo "✓ Binary is universal"
+else
+    echo "✗ Error: Binary not found at expected location"
+    exit 1
+fi
+
+# Deploy Qt dependencies
+echo ""
+echo "Deploying Qt dependencies..."
+$QT_PATH/bin/macdeployqt "$BUILD_DIR/$APP_NAME.app" -always-overwrite -verbose=1
+echo "✓ Qt dependencies deployed"
+
+# Code signing
+echo ""
+echo "========================================="
+echo "Listing identities for code-signing"
+echo "========================================="
+security find-identity -v -p codesigning
+
+echo ""
+echo "========================================="
+echo "Code signing .app bundle"
+echo "========================================="
+echo "Using: $APPLE_DEVELOPMENT_IDENTITY"
+
+cd "$BUILD_DIR"
+
+codesign --deep --force --timestamp --verify --verbose=1 \
+  --sign "$APPLE_DEVELOPMENT_IDENTITY" \
+  --options runtime "$APP_NAME.app"
+
+echo ""
+echo "Verifying code signature..."
+codesign --verify --deep --strict --verbose=1 "./$APP_NAME.app"
+echo "✓ Code signing complete"
+
+# Create DMG
+echo ""
+echo "========================================="
+echo "Creating DMG"
+echo "========================================="
+echo "NOTE: Install create-dmg if needed: https://github.com/sindresorhus/create-dmg"
+
+if ! command -v create-dmg &> /dev/null; then
+    echo "⚠ Warning: create-dmg not found. Install with: brew install create-dmg"
+    echo "Skipping DMG creation, notarization, and stapling."
+    cd ..
+    echo ""
+    echo "========================================="
+    echo "Build completed (without DMG/notarization)"
+    echo "App bundle location: $BUILD_DIR/$APP_NAME.app"
+    echo "========================================="
+    exit 0
+fi
+
+create-dmg "$APP_NAME.app" --identity="$APPLE_DEVELOPMENT_IDENTITY" --dmg-title="$APP_NAME"
+# WORKAROUND: https://github.com/sindresorhus/create-dmg/issues/52
+mv *.dmg "$APP_NAME.dmg" 2>/dev/null || true
+
+echo "✓ DMG created: $APP_NAME.dmg"
+
+# Notarization
+echo ""
+echo "========================================="
+echo "Starting Notarization"
+echo "========================================="
+echo "NOTE: Make sure you've run 'xcrun notarytool store-credentials' first"
+
+xcrun notarytool submit "$APP_NAME.dmg" \
+  --keychain-profile "default" \
+  --wait \
+  --timeout "10m"
+
+echo ""
+echo "========================================="
+echo "Stapling notarization ticket"
+echo "========================================="
+xcrun stapler staple -v "$APP_NAME.dmg"
+echo "✓ Notarization complete"
+
+# Optional: Create zip
+echo ""
+read -p "Create zip file? (y/N): " CREATE_ZIP
+if [[ "$CREATE_ZIP" == "y" || "$CREATE_ZIP" == "Y" ]]; then
+    ZIP_NAME="$APP_NAME-universal.zip"
+    zip -9 "$ZIP_NAME" "$APP_NAME.dmg"
+    echo "✓ Created: $ZIP_NAME"
+fi
+
+cd ..
+
+echo ""
+echo "========================================="
+echo "Build completed successfully!"
+echo "========================================="
+echo "App bundle: $BUILD_DIR/$APP_NAME.app"
+echo "DMG: $BUILD_DIR/$APP_NAME.dmg"
+echo ""
+echo "To test: open $BUILD_DIR/$APP_NAME.dmg"
+echo "========================================="