Why does iCloud always reject my correct apple ID and password?
I can log in to all apple services, on my Macbook Pro, on my iPhone, and on my apple watch. But upon startup Macbook Pro always asks me to log into iCloud and it never accepts the apple ID email address and valid password. Recently it has begun asking me to add a 6-digit number after my password — for two-phase login. So I do. No luck getting logged into iCloud that way either. I don't even WANT to log into iCloud, but OS 10.10.5 seems to insist on it.