title: Problems with Angular2 on macOS Sierra
body: <p>I have upgraded to mac os sierra GM version and having issue with angular2 cli.
  I had it installed before the upgrade and it was running fine. I’m getting <code>command not found</code> on terminal when I try anything with <code>ng</code>.
  I have tried to reinstall with command <code>sudo install -g angular-cli</code> and <code>sudo install angular-cli</code> it but nothing seems to work. I have the required nodejs and npm installed as pre-reqs for angular-cli.
  Looking for some possible solutions. Thanks</p>