iMac "Core i5" 3.1 21.5-Inch (4K, Late 2015) MK452LL/A

The iMac "Core i5" 3.1 21.5-Inch Aluminum (Retina 4K, Late 2015/Broadwell) features a 14-nm "Broadwell" Quad Core 3.1 GHz Intel "Core i5" processor (5675R) with four independent processor "cores" on a single chip, a 4 MB shared level 3 cache, 8 GB of onboard 1867 MHz LPDDR3 SDRAM (which could be upgraded to 16 GB at the time of order, but cannot be upgraded after system purchase at all), a 1 TB (5400 RPM) hard Overview:  Originally released October 2015 Lifelike images are brought to the smaller screen. For the first time Apple has built its 21.5-inch iMac MK452B/A with a Retina 4K display and a resolution of 4096 x 2304, which equates to a total of 9.4 million pixels. This is more than four times the number of pixels available in the standard 21.5-in iMac models. To further enhance its impressively thin edges and sleek curves, the 21.5-inch iMac with a Retina 4K comes with updated Apple Magic accessories to make Apple's small-scale powerhouse an object of pure beauty. Technical Specification: Intel Core i5 3.1 GHz with Turbo Boost to 3.6GHz 21.5-inch LED-backlit glossy widescreen display 4k Retina (4096 x 2304 resolution) Intel  Iris Pro 6200 1.5GB Shared Memory macOS 10.13 High Sierra (It does support Latest OS) 2 x 4GB (1600) DDR3 Ram 1TB SATA Drive FaceTime HD camera Thunderbolt Port, AirPort Extreme Wi-Fi (802.11n), Bluetooth 4.0 and Ethernet FireWire 800, Four USB 3.0 and SD Card slot Keyboard : Options Available! Condition Notes These iMac will have minor wear and comes with 6 Months Warranty for Hardware Failure 14 Days no Quibble Returns