From the press release:
I have always said if there ever came a day when I could no longer meet my duties and expectations as Apple’s CEO, I would be the first to let you know. Unfortunately, that day has come.
I hereby resign as CEO of Apple. I would like to serve, if the Board sees fit, as Chairman of the Board, director and Apple employee.
This can’t be good news regarding his health. I hope I’m wrong. Good luck, Steve…you’ve been a great inspiration to me.