Install Ionic Cordova Error

Ionic Framework ionic-v3
1

I am trying to install Ionic 2 on a OSx machine. I did install Node.js. When I run the following:

$ npm install -g ionic cordova

I get this error:

enter image description here

If anyone can assist, I would appreciate it.

UPDATE:

Downgraded Node to v6.9.1 and still get the same error:

enter image description here