Recently we discovered an issue when non-admins try to install Grid Calculator Pro Edition in Mac. Even if the admin password is entered during installation and it says that the installation was successful, the activation of license will not work. This is because a certain license file can not be installed when the user does not have admin rights, in turn meaning that license can not be activated.
Re-install Grid Calculator Pro Edition logged in as the administrator.
We are aware of this issue and are looking into a possible solution for future installers.