* Docker 1.13-RC (to support attachable overlay networks)
* At least a single host in Swarm Mode. (run `docker swarm init`)
`For more information on Swarm mode and configuration please have a look at the [Swarm Mode tutorial](https://docs.docker.com/engine/swarm/swarm-tutorial/). `
> For more information on Swarm mode and configuration please have a look at the [Swarm Mode tutorial](https://docs.docker.com/engine/swarm/swarm-tutorial/)
Check your `docker version` and upgrade to one of the latest 1.13-RCs from the [Docker Releases page](https://github.com/docker/docker/releases). This is already available through the Beta channel in Docker for Mac.
