Pick a directory to work in, you'll need to clone multiple repositories. We'll assume you picked `$HOME/kaleidoscope`, if you chose another adapt the commands below accordingly.
* On macOS, install using [homebrew](http://brew.sh/) [cask](https://caskroom.github.io/) with `brew cask install arduino` or download the application from [the official website](https://www.arduino.cc/en/Main/Software) and move it to your `/Applications` folder.
## Install the Keyboardio Hardware Definitions
```sh
# you'll need to know your arduino sketchbook directory