A quick guide for setting up NPM and Gulp on a Mac.

Install node.js and npm

Download and install the node installation from nodejs.org.

Install gulp globally

From terminal:

$ sudo npm install -g gulp

Install gulp in a project

From the project root:

$ npm init

$ npm install gulp --save-dev

You should now have a package.json file in your project root that lists gulp as a dependency and a node_modules directory containing gulp.