Retina 5K iMac

The Dell UP2715K 27-inch 5K display can now be connected to the Mac Pro (late 2013) and the 27-inch 5K Retina iMac (late 2014, pictured above), negating the need to add new graphics cards and deploy various hacks to get everything working together.

This is possible due to Apple enabling support for Dell's dual-cable solution, which takes up two DisplayPorts. So should you be running OS X Yosemite 10.10.3 on a compatible Mac, and desire upgrading your display, the Dell screen is worth the check to see about migrating to 5K.

Source: Marco