Drawbridge is a native macOS PDF markup and takeoff app built for architects, designers, and engineers, with cloud markups, text annotations, highlights, freehand drawing, callouts, measurements, and fast save/export workflows.

Requirements

• Apple Silicon Mac (M1 or newer)
• macOS 13.0 or newer

Download

Get the latest release here:

https://github.com/dansc89/Drawbridge/releases/latest

Download the .dmg, open it, then drag Drawbridge.app into Applications.

Quick Start

1. Open Drawbridge.
2. Open an existing PDF or create a new one.
3. Add markups.

Support

If you hit an issue, open a GitHub issue with:

• what file you opened
• what action you took
• what happened vs expected behavior

Developer Docs

Developer/build/release docs are in DEVELOPMENT.md. For trusted macOS distribution (Developer ID signing + Apple notarization), see the same doc. User manual is in USER_MANUAL.md.

Cloud Backend

Backend API and deployment docs for account auth, uploads, sessions, and realtime sync are in Backend/README.md.