I am trying to delete an old email account that is my Apple ID. However, I cannot change it to my apple account that I am using my present email. It will not let me do this because I am using the email account. Please advise.
How can I delete an old email that is tied to all my devices and use my present email. When I tried doing this I could not because my present email is in use.
MacBook Pro 13″, macOS 10.13