Installing webdriver agent for IOS devices

Hi, I am following this document below. I

Step 3 says that you need to register the device…
3. Log in to you Apple developer account and register your device.

I have 2 questions.

  1. Is this necessary? I thought that we can register the devices using XCode. Is there another way to go about this?

  2. When i go to the Accounts section of the link below after signing in with the apple ID, I do not see Certificates, IDentifiers, and Profiles. Hence I cannot perform step 3 for above.

Is there a complete up to date document/video that I can follow to simulate IOS devices using MAC book pro 2009, latest OS version of El Capitan. Thanks.