It's ask for your User's Administrator Name and password. Go to System Preferences, Users & Groups you will need your Administrator Password if it's locked to open. You should See your Current User name in first Box under name will be your user's classification such as Admin, Standard or Guest User. Click on your name and to the right box under Password- below Full Name :, Apple ID:, and Contacts Card:, you'll see 3 check boxes , you want to check the 2ND box which will say, " Allow user to administer this computer. From now on , your are now the root Administrator and you got your admin. Name and password. Hope this helps.