Using Mac terminal and trying to run a Gatsby site, I am running into a problem.
As far as I found out, it is becase of an old version of Node. Particularly, "Node 6.\* doesn't natively support async operations".

Just out for curiosity, the error I get when installing the app is:

```
async sendEvents() {
        ^^^^^^^^^^
SyntaxError: Unexpected identifier
    at createScript (vm.js:56:10)
    at Object.runInThisContext (vm.js:97:10)
    at Module._compile (module.js:542:28)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/usr/local/lib/node_modules/gatsby-cli/node_modules/gatsby-telemetry/lib/index.js:3:19)

```

So it looks like a matter of just upgrading.

Here comes the tricky part.

When I run `npm -v`, I get this output: `6.12.0`. Ok, all looks coherent. I get the error because I have version 6.

Then I go `brew upgrade npm` and check out the output: `Error: npm 12.11.1 already installed`.

Any comments?