Apple unveiled OS X Yosemite at WWDC. The fun starts with redesigned icons and sidebars for apps as well as translucent backgrounds. A new today view for the notification area is similar to the one in iOS 7 and is customizable with additional widgets from third-party apps. Spotlight’s been reworked to function a lot like an app launcher, giving you access to more things including web results from Wiki or Search. iCloud Drive will sync folders on your Mac to iOS and Windows while Safari now has a smart search field with everything condensed into a single bar. The Mail app’s been redesigned and includes Mail Drop, which will send large attachments (up to 5 GB) through iCloud to avoid having emails bounce back from having too-large attachments. The recipient gets your email with a secure link to download the attachment. The latest desktop OS aims to help you work seamlessly across all your Apple devices. AirDrop gives you the ability to hand-off files between Mac and iOS, something that you couldn’t do before. Your Mac can now instantly detect a mobile hotspot if your phone is nearby. Our favorite feature is the ability to make and receive phone calls and SMS messages right from your Mac, even if your phone’s on the other side of the room. OS X Yosemite will be releasing this fall for free.