There is a legitimate Serial Box Utility available on the App Store designed to help users organize their own purchased licenses and serial numbers securely.
Unauthorized activators may modify system files, potentially causing crashes or preventing future software updates. Legitimate Alternatives Download Serial Box Serial Seeker 2022 Activator 4MacOS zip
If you have lost a serial number for software you purchased, it is best to contact the developer directly or check the original packaging for the code. There is a legitimate Serial Box Utility available