Was just reading the Daily Mail online, (I know, I know--shocking tabloid...but entertaining), when I got a series of pop-up windows purportedly from Apple saying there were attempts being made to breach my security, get my banking details...and I should call a toll-free number.
I just shut down the window I was looking at and came directly to the Forum to ask about this.
I have a MacBook Air 11" circa 2012.