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 ...

A computer monitor with 2,880 lines of resolution. In 2014, Apple introduced an iMac with a 27" Retina 5K display. With a resolution of 5120x2880, it doubled the horizontal and vertical pixels of ...