title: npm throws EACCES error on installation of Angular CLI
body: <p>I am unable to install Angular Cli globally through npm.
  I keep getting this error when I run <code>npm install -g @angular/cli</code> on macOS:</p>
  
  <pre><code>npm ERR! node v6.9.2
  npm ERR! npm  v3.10.9
  npm ERR! path /usr/local/lib/node_modules
  npm ERR! code EACCES
  npm ERR! errno -13
  npm ERR! syscall access
  
  npm ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
  npm ERR!     at Error (native)
  npm ERR!  { Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
  npm ERR!     at Error (native)
  npm ERR!   errno: -13,
  npm ERR!   code: 'EACCES',
  npm ERR!   syscall: 'access',
  npm ERR!   path: '/usr/local/lib/node_modules' }
  npm ERR! 
  npm ERR! Please try running this command again as root/Administrator.
  
  npm ERR! Please include the following file with any support request:
  npm ERR!     /Users/apple/npm-debug.log
  </code></pre>