Since I just updated Docker to 1.1.0 I get:
Error response from daemon: client and server don\'t have same version (client : 1.13, server: 1.12) <
Error response from daemon: client and server don\'t have same version (client : 1.13, server: 1.12)
I find the version in brew is outdated compared to the one on the docker.io website. Therefore I think the best way is go to the website and download the install file.