IOS 8

iOS 8 is an upcoming version of iOS. It will feature new compatibilty with the upcoming OS X 10.10 "Yosemite" such as enabling Macintosh computers to intercept calls from your iPhone and be used to talk to the caller. A beta test is currently avalible under the same program provided for OS X "Yosemite". Both operating systems are slated for release in the fall of 2014. It'll be compatible for all iOS 7 devices.

Use iOS 8 on iPhone 6 From OS X Yosemite.