If you are looking for a full version of Mastercam, the best path is through official channels:
A more intuitive way to define, save, and recall tool assemblies. How Mastercam X9 Licensing Works mastercam x9 license key full
If you are a student or hobbyist, Mastercam offers a Demo/Home Learning Edition (HLE) for free. It allows you to learn the full interface, though it will not post g-code for a machine. If you are looking for a full version
Mastercam has a global network of resellers who can provide legacy support or upgrade paths to the latest version. Mastercam has a global network of resellers who
A physical USB dongle that must be plugged into the computer for the software to run. This is the most common "full" license type for X9.
Mastercam X9: Understanding Licensing, Features, and Official Access
Mastercam X9 introduced several "game-changing" features that streamlined the workflow from CAD design to CNC machining: