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.
to make sure your system is all good.
Follow any other recommendations from brew doctor.
Next, add the Homebrew location to your $PATH and source your bash profile
Install Node with NPM
brew install node
To test out your Node and npm install, try installing Grunt (you might be asked to run with sudo)
sudo npm install -g grunt-cli
Add the path from the grunt installer to your bash profile by typing in export PATH=/usr/local/lib/node_modules/grunt/bin:$PATH
Made the profile an executable source ~/.bash_profile
this should do the trick