With his contract at Everton due to expire at the end of the season, Moyes had been considering his future for several weeks, but the Scot was leaning towards staying at Goodison Park before a dramatic 48 hours that changed the face of English football.
On Wednesday United manager Alex Ferguson rocked the sport when he revealed he would retire at the end of the season, prompting the Premier League champions to make their move for Moyes, who had been recommended by the man he will replace as Old Trafford supremo.
"Things have developed very quickly," Moyes said on Friday. "It was a whirlwind and it would be completely wrong to say it was done a month ago.
"Everton Football Club is such an important thing for me. But as for thinking about turning the job down, if I am being honest, I have to say no I didn't.