This post is intended to assist folks who are trying to install and work with grunt on mac osx

Install Node.js and npm with Homebrew

First, install Homebrew by typing in the following command ruby -e “$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

Then, type in brew update to ensure your Homebrew is up to date.

brew update

Run

brew doctor 

to make sure your system is all good.

Follow any other recommendations from brew doctor.

Next, add the Homebrew location to your $PATH and source your bash profile

export PATH="/usr/local/bin:$PATH"

Install Node with NPM

brew install node

To test out your Node and npm install, try installing Grunt (you might be asked to run with sudo)

sudo npm install -g grunt-cli

Add the path from the grunt installer to your bash profile by typing in export PATH=/usr/local/lib/node_modules/grunt/bin:$PATH

Made the profile an executable source ~/.bash_profile

this should do the trick