Formula for Docker 1.6.2 is not included in brew's index.
$ brew search docker
boot2docker docker docker-compose docker-machine docker-swarm
homebrew/completions/boot2docker-completion homebrew/versions/docker150
homebrew/completions/docker-completion Caskroom/cask/boot2docker-status
homebrew/versions/boot2docker133 Caskroom/cask/boot2docker
homebrew/versions/boot2docker141 Caskroom/cask/docker-compose
homebrew/versions/docker133 Caskroom/cask/docker-machine
homebrew/versions/docker141
Quick hack to install Docker 1.6.2 via brew.
# move 1.7.0 file for backup
$ mv /usr/local/Library/Formula/docker.rb /usr/local/Library/Formula/docker.rb.v1.7.0
# download 1.6.2 formula
$ curl https://raw.githubusercontent.com/Homebrew/homebrew/0c3af2daa8e3e7f66d99e1c7a7c1a14a6eef5963/Library/Formula/docker.rb > /usr/local/Library/Formula/docker.rb
#install docker
$ brew install docker
# check version
$ docker version
Client version: 1.6.2
Client API version: 1.18
Go version (client): go1.4.2
Git commit (client): 7c8fca2
OS/Arch (client): darwin/amd64
Server version: 1.6.2
Server API version: 1.18
Go version (server): go1.4.2
Git commit (server): 7c8fca2-dirty
OS/Arch (server): linux/amd64
You can also...