If your computer is connected to the internet, the software will automatically attempt to send your installation code to Quark's servers to receive an activation code back.
Finding a "2021 activation code" for a software version from 2008 is technically impossible because codes are unique to the hardware they are installed on. Users often face the following hurdles: QuarkXpress v. 8,5 on Mojave 10.14 or Catalina 10.15?
If internet activation fails, you can select the "Other Activation Options" button. This will provide a 47-digit Installation Code . You must share this code with the Quark Support Team to receive a corresponding activation certificate. Challenges with Older Activation Codes
The unique identifier for your specific copy of the software.