title: Running NPM gives SyntaxError: Unexpected Identifier
body: <p>Using brew on Mac to install Node and NPM. Running npm gives error</p>
  
  <pre><code>/usr/local/lib/node_modules/npm/bin/npm-cli.js:85
        let notifier = require('update-notifier')({pkg})
            ^^^^^^^^
  SyntaxError: Unexpected identifier
      at exports.runInThisContext (vm.js:73:16)
      at Module._compile (module.js:443:25)
      at Object.Module._extensions..js (module.js:478:10)
      at Module.load (module.js:355:32)
      at Function.Module._load (module.js:310:12)
      at Function.Module.runMain (module.js:501:10)
      at startup (node.js:129:16)
      at node.js:814:3
  </code></pre>
  
  <p>I found some similar questions, but either not exactly like it, or with no solution. So nothing seems to work for me. Any idea?</p>