Apple streams its major keynote presentation to most of its own devices, plus YouTube. Here's how to find the best way to watch for you. Apple's Worldwide Developers Conference 2021 is an online-only event, that runs for the whole week of June 7 to June 11. Most are only interested in June 7, 2021, from 10:00 AM PT to perhaps noon. There is a lot more to the conference than this opening keynote. And because it's all online, there is more chance to see video of the many developer sessions. But developers and users alike will be watching for Tim Cook to step out and say, "Good morning." Here's how to watch him say it — and learn what Apple is launching and updating this year.