iMac performance is at an all-time prime with faster Intel Core processors, tough Radeon Professional 500-series graphics, Thunderbolt 3 (USB-C) connectivity, and Surprising Retina 4K and 5K presentations that shine 43 % brighter and give a boost to one billion colors.
27-inch (diagonal) 5120-by-2880 Retina 5K display
Surprising five-mm-skinny design
Seventh-generation 3.5GHz dual-core Intel Core i5 processor
Radeon Professional 57, 575, or 58 with as much as 8GB video memory
Two Thunderbolt 3 (USB-C) ports
Magic Mouse 2 and Magic Keyboard