Installation
Mac Installation
Install VirtualBox
Install Homebrew
If Homebrew is already installed, then be sure to do a brew update 
Tap the DevTools repository
brew tap phase2/devtools
Install DevTools (and dependencies)
brew install devtools
This will install the devtools binary as well the Docker and other dependencies.
Create the Docker Host
Once everything checks out, run the following command to create a new docker host. (You will likely be prompted for your admin password)
devtools start
Here are some configuration options available to you to customize your setup:
- name: The Docker Machine name for the VM. Defaults to 
dev - driver: The driver to create the Docker Machine with. Choices are:
virtualbox- defaultvmwarefusionxhyve
 - cpuCount: The number of virtual CPU you want to allocate to this VM. Defaults to 2
 - memSize: The size memory you want to configure for this VM, in Megabytes. Defaults to 4096
 - diskSize: The size drive you want to configure for this VM, in Gigabytes. Defaults to 40
 
Configure your shell to set DevTools Docker environment
To configure the shell with the proper DevTools environment, run the following command after the docker host has started from the previous step.
eval "$(devtools config)"
For convenience, you should make this automatic on every terminal you launch. To do that 
add the following to your .bash_profile, .zshrc or equivalent:
# Support for DevTools
eval "$(devtools config)"
alias dte='eval "$(devtools config)"'
Running devtools config
Even with automatic execution in your shell, this command must be run in any existing 
terminal windows after devtools start or devtools restart commands. To support that
see the dte alias in the shell init file above. Just run dte after a devtools start