Installing Craft 3 RC on MAMP Pro - Pointing to the file directory After a successful install I point the (MAMP PRO 4+) Document Root to the Craft /web folder, which allows the final setup process. (via www/admin) However pointing at the site root (www) triggers this error; HTTP 404 – Not Found – yii\web\NotFoundHttpException

I am missing a final step?
Craft 3 does not come up with templates or default entries like Craft 2 so your templates directory is probably empty. As soon as you create some files there and link them to your entries you won't see the error when you enter your home url