At WWDC Apple announced the next version of their OS X operating system. This next release, presumably version 10.11, is named OS X El Capitan. OS X Yosemite came with a comprehensive redesign which brought it in line with the new design principles that Apple introduced with iOS 7. The focus of El Capitan can be found in its name, which is a rock formation within Yosemite National Park. With Yosemite being the radical revamp, El Capitan focuses on improvements to the user experience and to performance.
Mission Control sees a number of improvements as well. On the most basic level, there are a few changes to the interface. A blur effect is no longer applied to your wallpaper, and the bar at the top with your virtual desktops doesn't expand if you only have a single desktop at that moment, which gives more space for application windows. Apple has also added the ability to drag windows into the bar at the top to instantly put them into fullscreen mode.
Application multitasking has also been improved. El Capitan has a new feature that essentially performs the same function as Aero Snap on Windows. Two apps or other parts of the interface can be set so they split the screen down the middle. This even works with parts of the OS like Mission Control which you can see in the photo above.
There are two areas of performance that need to be considered. The first is raw speed, while the second is the frame rate of animations. El Capitan tackles some of the issues with the first aspect, but Apple has definitely been focusing on the second aspect with their announcement that the Metal graphics API is coming to OS X. Both the Core Graphics and Core Animation APIs now run on Metal rather than OpenGL. According to Apple, they've seen up to a 50% in rendering performance with Metal, and this will hopefully translate to improved UI smoothness for users.
The developer beta of OS X El Capitan is available today so developers can test their apps and try out new APIs. Like Yosemite, El Capitan will have a public beta beginning in July, and the final release will come this fall.
