Powerbook is a script to set up a Mac OS X laptop ready for development.
When all is complete, you'll need to setup iTerm2 color scheme manually, download SpaceGray theme from iterm2colorschemes and then load it from the color tab in iTerm2, finally set the font to Source Code Pro for Powerline need it by the agnoster theme for zsh.
You'll get something like this:
run the script:
$ bash -c "$(curl -fsSL raw.github.com/rauluranga/powerbook/master/bin/install)"