MAMP PRO 6.6.3 is a professional-grade local server environment designed primarily for macOS and Windows, enabling developers to run Apache or Nginx web servers, MySQL databases, and various versions of PHP simultaneously. Key Features and Updates in Version 6.x

: Includes a simple syntax check for both local and remote PHP and Python files.

: A built-in QR code generator allows you to quickly open local sites on mobile devices for responsive testing.

: Run different versions of PHP for different hosts at the same time.

: Save the state of a host (including its database) to easily revert to a previous version during development. Setup and Best Practices Solved: MAMP PRO Mac won't let me add hosts anymore