Hello, I change my email ID yesterday on the web (https://appleid.apple.com/account/manage) I see it was successful nevertheless, when I'm on my mac, and i go go System Preferences, iCloud, well under my picture I still see my old email address and so when I click on manage account, it asks me to sign in. I put in my password but of course it says the apple id is incorrect. How do I change it on my mac? Has this happened to anybody before? does anybody have a solution? Thanks!