To run the application on the device (MAC address already registered) please follow the steps below:
1.Download the iOS installation file from the email to your system (Desktop or Laptop)
2.Connect your Device (whose MAC address is already registered) - iPhone/iPad
3.Double click on the file and open the file with iTunes
4.Click on the Apps button on the Top Navigation Bar
5.In the apps Section, you will notice that the Application would be listed and an Install Button beside it
6.Click on the Install Button, followed by the Apply button on the right bottom corner of the Screen
7.This will perform the installation
Link to download the iTunes software.
After the application is released in the market place the user would not have to enter the MAC address.