diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..30e7de5
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,139 @@
+name: Release
+
+# Triggered when a version tag is pushed (e.g. v1.2.3).
+# Builds a fully code-signed, notarized macOS app and attaches it to a GitHub Release.
+#
+# Required GitHub Actions secrets:
+#   DEVELOPER_ID_APPLICATION_CERT_P12_BASE64
+#       Base64-encoded Developer ID Application certificate (.p12).
+#       Export from Keychain Access and encode with:
+#           base64 -i cert.p12 | pbcopy
+#   DEVELOPER_ID_APPLICATION_CERT_PASSWORD
+#       Password used to protect the exported .p12 file.
+#   APPLE_TEAM_ID
+#       10-character Apple Developer Team ID (visible in developer.apple.com).
+#   NOTARIZATION_APPLE_ID
+#       Apple ID (email) used to submit the notarization request.
+#   NOTARIZATION_PASSWORD
+#       App-specific password for the Apple ID above.
+#       Create one at appleid.apple.com under "Sign-In and Security".
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  release:
+    name: Build, Sign, Notarize & Release
+    runs-on: macos-14
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Show Xcode version
+        run: xcodebuild -version
+
+      # ── Code-signing setup ────────────────────────────────────────────────
+      - name: Import Developer ID certificate
+        env:
+          P12_BASE64: ${{ secrets.DEVELOPER_ID_APPLICATION_CERT_P12_BASE64 }}
+          P12_PASSWORD: ${{ secrets.DEVELOPER_ID_APPLICATION_CERT_PASSWORD }}
+        run: |
+          # Write the p12 to a temp file
+          P12_PATH="$RUNNER_TEMP/developer_id.p12"
+          echo "$P12_BASE64" | base64 --decode -o "$P12_PATH"
+
+          # Create a temporary keychain so the cert is isolated from the login keychain
+          KEYCHAIN_PATH="$RUNNER_TEMP/signing.keychain-db"
+          KEYCHAIN_PASSWORD="$(openssl rand -hex 16)"
+          security create-keychain -p "$KEYCHAIN_PASSWORD" "$KEYCHAIN_PATH"
+          security set-keychain-settings -lut 21600 "$KEYCHAIN_PATH"
+          security unlock-keychain -p "$KEYCHAIN_PASSWORD" "$KEYCHAIN_PATH"
+
+          # Import the certificate
+          security import "$P12_PATH" \
+            -k "$KEYCHAIN_PATH" \
+            -P "$P12_PASSWORD" \
+            -T /usr/bin/codesign \
+            -T /usr/bin/security
+
+          # Allow codesign to access the key without a UI prompt
+          security set-key-partition-list \
+            -S apple-tool:,apple: \
+            -k "$KEYCHAIN_PASSWORD" \
+            "$KEYCHAIN_PATH"
+
+          # Make the temporary keychain the default search list
+          security list-keychains -d user -s "$KEYCHAIN_PATH" $(security list-keychains -d user | tr -d '"')
+
+      # ── Archive ───────────────────────────────────────────────────────────
+      - name: Archive
+        run: |
+          set -o pipefail
+          xcodebuild archive \
+            -project "Table Tool.xcodeproj" \
+            -scheme "Table Tool" \
+            -configuration Release \
+            -archivePath "$RUNNER_TEMP/TableTool.xcarchive" \
+            ONLY_ACTIVE_ARCH=NO \
+            MACOSX_DEPLOYMENT_TARGET=10.13 \
+            CODE_SIGN_STYLE=Manual \
+            CODE_SIGN_IDENTITY="Developer ID Application" \
+            DEVELOPMENT_TEAM="${{ secrets.APPLE_TEAM_ID }}" \
+            | xcpretty
+
+      # ── Export (produces the signed .app) ─────────────────────────────────
+      - name: Export archive
+        run: |
+          # Substitute the Team ID placeholder in ExportOptions.plist
+          sed "s/\$(APPLE_TEAM_ID)/${{ secrets.APPLE_TEAM_ID }}/g" \
+            ExportOptions.plist > "$RUNNER_TEMP/ExportOptions.plist"
+
+          set -o pipefail
+          xcodebuild -exportArchive \
+            -archivePath "$RUNNER_TEMP/TableTool.xcarchive" \
+            -exportPath "$RUNNER_TEMP/export" \
+            -exportOptionsPlist "$RUNNER_TEMP/ExportOptions.plist" \
+            | xcpretty
+
+      # ── Notarize ──────────────────────────────────────────────────────────
+      - name: Notarize app
+        env:
+          NOTARIZATION_APPLE_ID: ${{ secrets.NOTARIZATION_APPLE_ID }}
+          NOTARIZATION_PASSWORD: ${{ secrets.NOTARIZATION_PASSWORD }}
+          APPLE_TEAM_ID: ${{ secrets.APPLE_TEAM_ID }}
+        run: |
+          APP_PATH="$RUNNER_TEMP/export/Table Tool.app"
+
+          # Zip the app for submission (notarytool accepts a zip)
+          ditto -c -k --sequesterRsrc --keepParent \
+            "$APP_PATH" \
+            "$RUNNER_TEMP/TableTool-notarize.zip"
+
+          # Submit and wait for Apple's notarization service
+          xcrun notarytool submit "$RUNNER_TEMP/TableTool-notarize.zip" \
+            --apple-id "$NOTARIZATION_APPLE_ID" \
+            --password "$NOTARIZATION_PASSWORD" \
+            --team-id "$APPLE_TEAM_ID" \
+            --wait
+
+          # Attach the notarization ticket to the app bundle
+          xcrun stapler staple "$APP_PATH"
+
+      # ── Package the final artifact ────────────────────────────────────────
+      - name: Package signed app
+        run: |
+          ditto -c -k --sequesterRsrc --keepParent \
+            "$RUNNER_TEMP/export/Table Tool.app" \
+            "$RUNNER_TEMP/TableTool.zip"
+
+      # ── GitHub Release ────────────────────────────────────────────────────
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: ${{ runner.temp }}/TableTool.zip
+          generate_release_notes: true
diff --git a/ExportOptions.plist b/ExportOptions.plist
new file mode 100644
index 0000000..bf58bd5
--- /dev/null
+++ b/ExportOptions.plist
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>method</key>
+	<string>developer-id</string>
+	<key>teamID</key>
+	<string>$(APPLE_TEAM_ID)</string>
+	<key>signingStyle</key>
+	<string>manual</string>
+	<key>signingCertificate</key>
+	<string>Developer ID Application</string>
+</dict>
+</plist>