diff --git a/building/macos/build.sh b/building/macos/build.sh
new file mode 100644
index 000000000..66579f022
--- /dev/null
+++ b/building/macos/build.sh
@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Build FGCS for macOS (arm64 by default). Run from any directory.
+# Usage: ./build.sh <version>
+
+if [[ ${1:-} == "" ]]; then
+  echo "Usage: $0 <version>"
+  echo "Example: $0 0.2.0-alpha"
+  exit 1
+fi
+
+VERSION="$1"
+
+echo "Assuming location is FGCS/building/macos"
+cd ../../
+
+echo "Building backend"
+cd radio
+source ./venv/bin/activate
+python3 -m pip show pyinstaller >/dev/null 2>&1 || python3 -m pip install pyinstaller
+
+# Clean previous dist if present (pyinstaller asks otherwise)
+rm -rf dist/fgcs_backend dist/fgcs_backend.app || true
+
+# Build
+pyinstaller \
+  --paths ./venv/lib/python3.11/site-packages/ \
+  --add-data="./venv/lib/python*/site-packages/pymavlink/message_definitions:message_definitions" \
+  --add-data="./venv/lib/python*/site-packages/pymavlink:pymavlink" \
+  --hidden-import pymavlink \
+  --hidden-import engineio.async_drivers.threading \
+  --windowed \
+  --name fgcs_backend \
+  ./app.py
+
+# Move backend app bundle into gcs/extras
+BACKEND_APP_PATH="dist/fgcs_backend.app"
+EXTRAS_DIR="../gcs/extras"
+
+rm -rf "$EXTRAS_DIR" && mkdir -p "$EXTRAS_DIR"
+cp -R "$BACKEND_APP_PATH" "$EXTRAS_DIR/"
+
+echo "Copied backend to ${EXTRAS_DIR}/fgcs_backend.app"
+
+# Generate param definitions, then build frontend + Electron package (DMG)
+cd ../gcs/data
+python3 generate_param_definitions.py
+echo "Generated param definitions"
+
+cd ../
+yarn
+yarn version --new-version "$VERSION" --no-git-tag-version --no-commit-hooks
+yarn build
+
+echo "Build finished, check gcs/release/${VERSION} for output."