• Install packages
• CrossPack AVR for OSX
• Get & install Homebrew (http://brew.sh)
• GCC-ARM tools and essential build tools
• Installing Python and PyQt5 on OSX (up to, but not including OpenTX 2.2.2)
• Installing Python and Pillow on OSX (from OpenTX 2.2.2 on)
• Prepare the source code
• Build OpenTX 2.2 Firmware and companion
• Building a release