To download new firmware to a Pixhawk board, install QGroundControl from http://qgroundcontrol.com and follow the on-screen instructions.
Some operating systems require a driver for the USB connection.
- Windows: PX4FMU and PX4FLOW drivers
- Recommended: PX4 Driver Installer for Windows Download (32/64 bit systems)
- Mac OS: Comes with in-built drivers, no additional driver for the micro USB port, but you need the VCP drivers (32/64 bit) on MacOS X Lion or above for the FTDI connection
- Linux: Comes with in-built drivers, no additional driver needed