Cloud SQL Proxy is one of the ways to connect to your Cloud SQL instance. It’s useful if you want to securely connect to Cloud SQL from your local applications. Here are the steps to setup Cloud SQL Proxy on your local machines: 1. Download and Setup Cloud SQL Proxy (macOS) First of all you have to download it. I would recommend putting it at root (~/) folder. $~ cd ~/ $~ curl -o cloud_sql_proxy https://dl.