Apple will stream its 2014 WWDC keynote on 2 June 2014 at 10 AM PDT. The video will be available in Safari on Macs running Mac OS X 10.6 Snow Leopard or later and iOS devices with iOS 4.2 or later; you can also watch on second- and third-generation Apple TVs with current software. Look for news about future versions of OS X and iOS, and potentially some hardware announcements as well. If you miss the live broadcast, the video will almost certainly be available later too. follow link
Option-click to Hide Apps Quickly
This trick has been available in the Mac OS for years, but many people still don't know it. If you have too many windows cluttering up your screen, you can hide specific ones easily as you work. When you're in any application, hold down the Option key and click on another app's window, on the Dock, or in the Finder to switch to that other app and simultaneously hide all the windows in the previously current app.
Apple to Stream 2014 WWDC Keynote