iMac .Retina. Now in colossal and ginormous.
The idea behind iMac has never wavered: to craft the ultimate desktop experience. The best display, paired with high-performance processors, graphics, and storage &mdash. all within an incredibly thin, seamless enclosure. And that commitment continues with the all-new 21.5-inch iMac with Retina 4K display. Like the revolutionary 27-inch 5K .model, it delivers such spectacular image quality that everything else around you seems to disappear. Adding up to the most immersive iMac experience yet &mdash. and another big, beautiful step .forward.
Retina Display:  .More than just a display, it&rsquo.s a vision.
Accuracy. Brightness. Clarity. Regardless of how you measure the quality of a display, Retina is in a class by itself. The pixel density is so high that you won&rsquo.t detect a single one while using iMac. Text is so sharp, you&rsquo.ll feel like you&rsquo.re reading email and documents on a printed page. And with a new, wider color gamut, the Retina display is able to deliver even more available colors &mdash. 25 percent more. So every photo and video you see appears even more true to life.
Design: .Innovation from edge to cutting edge.
An incredible amount of engineering was required to bring the Retina display to the iMac family. Witness a design that&rsquo.s just 5 mm at its edge &mdash. yet entirely capable of making everything around you fade into the distance. This ensures that nothing gets between you and your favorite content. Seamless and beautiful, iMac with Retina display is an elegant addition to your workspace, representing a depth of technology at the height of design.
Performance: .Built for speed. And everything else.
Faster and more powerful than ever, the 27-inch iMac is equipped with a sixth-generation Intel Core processor and the latest AMD high-performance graphics. And the 21.5-inch iMac features a fifth-generation Intel Core processor and enhanced Intel Iris Pro Graphics. Both deliver stirring visual effects with maximum impact &mdash. at maximum speed.
OS X. It&rsquo.s what makes a Mac a Mac.
OS X is the operating system that powers every Mac. Built on a rock-solid UNIX foundation, it&rsquo.s engineered to take full advantage of what the hardware is capable of. It&rsquo.s designed to be as easy to use as it is beautiful to look at. It comes with an amazing collection of apps you&rsquo.ll use &mdash. and love &mdash. every day. And it enables your Mac and iOS devices to work wonderfully together.
Software and hardware made for each other.
OS X is built to bring out the best in your Mac, so you get a fully integrated system in which everything works together seamlessly. It works with the processor and graphics controller in your Mac to deliver the best possible performance. It works with the super-responsive trackpad in Mac notebooks so Multi-Touch gestures feel natural to use. OS X even keeps your Mac up to date while it sleeps. Advanced power-saving technologies help extend battery life. And in OS X El Capitan, new system fonts are designed to look crisp and vivid on high-resolution Retina displays.