Mathematica keygen invalid mathid

The MathID is unique to the system's hardware and so should be the same for every version of Mathematica but it's better to let the new installation present the value of the MathID to you in case that changes with a new version of the software. How the MathID is found may vary with the version and implementation of Mathematica. The MathID is a string of the form nnnn-nnnnn-nnnnn and may appear in one of the initial start-up windows. If it doesn't appear one way to find the MathID is to start the installation and when prompted for an activation key select Other ways to activate and choose Manual Activation : the MathID will appear on the next screen. Sometimes you can use the Mathematica Kernel (mathkernel) program to supply the information by typing. at the command prompt within the Mathematica Kernel window. If you are upgrading from an existing version of Mathematica you can find the MathID by doing the following. Help - About Mathematica - System Information - MathID / MachineID. MathID and MachineID are different names for the same thing. MathID is the newer term because Mathematica may be running rimultaneously on several machines, the "Cloud" or the Web. Oxford Mathematica Site Navigator.