If you have been around the Mac community long enough, you may have ended up with two Apple IDs. I have one for iTunes and another one that came from MobileMe. This resulted in effectively having two iCloud accounts. This can be inconvenient and probably will become more so in the future. Apple doesn’t provide a means to merge Apple IDs. They know they need to provide this, but they do not yet do so. I, however, have found a way.
Since the introduction of iCloud, I have wanted to have a single Apple ID. When Apple recently added the two-step authentication for Apple IDs to make them more secure, I decided to sign in and update my Apple ID account. Part of the process is to verify a device you own which will be used, along with your password, to authenticate that you are who you say you are should you want to make changes (such as your password) to your Apple ID in the future. The webpage said it would list my devices, but none were listed. It didn’t take long to figure out why. The Apple ID I was updating was for iTunes, while the Apple ID Apple was using to find my devices was the one associated with my iCloud (MobileMe/mac.com) account.