Before installing Node.js, just check if it is already installed in your machine. You can check by using node –version command. This will give you the current version of Node.js.
If it is not installed already, then you can use brew to easily install ant. Simply execute the following command in a terminal window to install brew
ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go/install)"
It may take a while to download and install. If you already have brew installed, make sure to update it by executing below command
brew update
Once brew is installed you can use below command to install Node.js
brew update brew upgrade node brew install node
Node should will be installed. Check if installed successfully
node --version