If you are not able to run Drupal on Nginx, it might be that you are missing the additional parameters for location and you need to use port 81 (unless you set a different port to use)
Here's how it is done. Under the try_files: field, type in:
$uri $uri/ /index.php?$args;
This was working on the MacOS version but I think this is the same on both MAMP Pro for Mac and Windows.