~/Library/Mathematica/Licensing/mathpass. /Library/Mathematica/Licensing/mathpass. The mathpass file is located at one of the following locations: You may need to adjust a setting to show hidden files. C:\Program Files\Wolfram Research\Mathematica\Configuration\Licensing\mathpass. C:\Users\\AppData\Roaming\Mathematica\Licensing\mathpass. C:\ProgramData\Mathematica\Licensing\mathpass. The mathpass file is at one of the three following locations: In your respective operating system, please open your mathpass file using a basic text editor. Looking Up Licensing Information from Within MathematicaĮvaluate FilePrint to obtain the content of the mathpass file that this instance of Mathematica is referencing. You may need to locate your mathpass file in order to reset your Mathematica license by hand or look up any of the above licensing details. If you believe your time-limited license has expired prematurely, please contact Wolfram Research Customer Service or your local Wolfram Sales Partner.Mathematica stores its license information, consisting of the machine name, Math ID, activation key and password, in a text file named “mathpass”. If you are using a time-limited license, you will be prompted to reactivate your license when it expires. 
If you are using the Semester or Annual Edition of a Wolfram product, you can purchase a new license through the Wolfram Store. If you are using a trial version of the product, you can purchase the product through the Wolfram Store. 
If you obtained the product through a site license, contact your Site Administrator for instructions to request a new activation key or password. To clear this information and reuse your existing activation key with your new system configuration, please complete and submit a System Transfer Form. 
Your activation key was associated with your previous system’s MathID during an earlier activation process. You may be prompted to reactivate your product for any of the following reasons:
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