Websites promising free license keys or "keygen" downloads for version 3.1.2.6 are almost always traps. Because this software interacts directly with your system drivers and Bluetooth stack, installing a cracked version is incredibly risky. You aren't just getting a utility; you're likely inviting: Malware & Spyware:

While the Magic Mouse is an excellent input device out of the box, its native features may not be enough for power users or those who require advanced customization options. The built-in gestures and settings provided by Apple may not be sufficient for everyone, and users may find themselves wanting more. This is where third-party utilities like Magic Mouse Utilities 3126 come into play.

This will enable basic mouse functionality and standard scrolling without needing any third-party software. 2. GitHub Open-Source Projects