Question: I used to use an old email address for my apple id but changed the email for my apple id a year ago. Whenever I update my computer, it brings up my old email as my apple id and wants me to put in my old PW which I don't remember. Why?
I changed the email address and password for my apple id in 2016. I can sign in with the new one fine and use iTunes, App store, etc. But every time I have a computer update or if I try to open System Preferences, an iCloud window opens up that says I need to update my password for the old apple ID (my old email address that I do not use now.) Why does that keep happening since I changed my apple id and have a different one now? How can I get my computer to get rid of that old apple id?
MacBook Pro, macOS High Sierra (10.13.1)