Apple’s website explains the interesting technical features that allow the iMac to have a 5K display, including a custom timing controller, Oxide TFT and highly efficient LEDs. Because there are ...

The 27-inch iMac 5K was announced as a significant ... such as connecting two 4K monitors or a single 5K external monitor. In 2015, Apple introduced the 21.5-inch iMac 4K with various upgrades ...