Mathematica 9 is over a decade old. Even the legitimate version receives no new features, but you may still need bug fixes or security patches. With a cracked copy:
Many key generators are bundled with trojans, ransomware, or spyware. When you run the generator, you may be installing malicious software that steals personal data, locks your files, or turns your computer into part of a botnet. mathematica 9 activation key generator
To ensure your software is stable, secure, and fully functional, it is necessary to use a valid, legally obtained activation key. According to Wolfram Support , you can find your legitimate activation key in three ways: Mathematica 9 is over a decade old