RabbitMQ is the default broker so it does not require any additional dependencies or initial configuration, other than the URL location of the broker instance you want to use:
BROKER_URL = 'amqp://guest:guest@localhost:5672//'
Development
Generic Unix
# install brew
ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"
# install rabbitmq
brew install rabbitmq
echo "PATH=$PATH:/usr/local/sbin" >> .profile
# start service
brew services start rabbitmq
# stop service
brew services stop rabbitmq