Delete iCloud account
How do I delete my iCloud account and have all email forwarded to new email address? I no longer own a Mac and I do not wish to continue to use iCloud.
MacBook
While we all have MacBooks in this forum most of us don’t use iCloud. There's an iCloud Support Community where everybody uses iCloud. You should also post this question there to increase your chances of getting an answer. https://discussions.apple.com/community/icloud/icloud_on_my_mac