If you have a legitimate license, you can manage it through the official channels:
Released in 2016, Parallels Desktop 12 was a major version of the virtualization software designed to run Windows on Mac. While it was a solid release for its time, it is now considered legacy software and may not be compatible with modern macOS versions like Sonoma or Sequoia. If you have a legitimate license, you can
: Users on newer macOS versions often report that Parallels 12 cannot be installed or activated because the OS no longer supports it. Legitimate Activation & Support If you have a legitimate license