error with email account setting up iCloud on MacBook when in initially began the iCloud setup on MacBook i put in wrong email address. I don't think i put in a password. Now i keep getting box that says it can't access iCloud . I have a proper username and password for apple id , iTunes etc which I want to use. How do i get rid of this wrong iCloud username?
Try signing out of iCloud. 


Open System Preferences
Choose the iCloud panel 
Click Sign Out