diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 4efcb24534..8fc1617a3d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -29,13 +29,17 @@ sake of completeness, you can also install [Node.js 0.10.38](https://nodejs.org/
 
 ### Getting Started
 
-
 - `npm install`
 
 To run the app in development:
 
 - `npm start`
 
+Running `npm start` will download and install the OS X Docker client,
+[Docker Machine](https://github.com/docker/machine), [Docker Compose](https://github.com/docker/compose)
+the [Boot2Docker iso](https://github.com/boot2docker/boot2docker),
+[Electron](http://electron.atom.io/).
+
 ### Building & Release
 
 - `npm run release`