iMac (21.5-inch Retina 4K, 3.3GHz Intel Core i7, Late 2015)

The iMac (21.5-inch Retina 4K, 3.3GHz Intel Core i7, Late 2015) is a built-to-order iteration of the iMac (21.5-inch Retina 4K, 3.1GHz Intel Core i5, Late 2015) but with the top-class quad processor Core i7 3.3. The design is similar to the iMacs of 2012. This is the all-in-one desktop computer in an ultra-thin (5 mm depth at the edges) all-aluminum unibody casing behind the 21.5-inch LED-backlit IPS screen with cover glass fully laminated to the LCD and anti-reflective coating. There’s a bulge though in the center of the back panel to house all the hardware. The computer is mounted on an aluminum stand with a slightly tapered foot and an adjusting hinge.

Apple iMac 21.5-inch with Retina 4K display: Unboxing & Review [Video]

Video uploaded by DetroitBORG on October 16, 2015

iMac (21.5-inch Retina 4K, 3.3GHz Intel Core i7, Late 2015)

The iMac (21.5-inch Retina 4K, 3.3GHz Intel Core i7, Late 2015) features a dual core 3.3 GHz Intel Core i7 I7- 5775R processor (Broadwell), with four independent processor cores on a single chip, DMI system bus and an integrated graphics core, 8 GB of RAM, a 1TB hard drive (5400 RPM), an SD memory slot card reader, an integrated Intel Iris Pro 6200 Graphics 6000 graphics with 1.7 GB of shared memory, a built-in FaceTime HD webcam and stereo speakers, as well as two “Thunderbolt-2” ports and 4 USB 3.0 ports. It also has built-in AirPort Extreme (802.11g) and Bluetooth 4.0. The cooling system is CPU controlled and the in-built speakers are mounted beneath the 21.5-inch screen for the clearer less distorted sound to bounce off the desk or other surface. The speakers’ grills also work as the vent ones. The iMac (21.5-inch Retina 4K, 3.3GHz Intel Core i7, Late 2015) is shipped with a compact aluminum Apple Wireless Keyboard and either with a “Magic Mouse” or a traditional wired Apple Mouse or a multi-touch Magic Trackpad.

imac 21 5 inch late 2015 - iMac (21.5-inch Retina 4K, 3.3GHz Intel Core i7, Late 2015)
iMac (21.5-inch, Retina 4K, Late 2015). Photo from

Release Dates

Introduced: October 13, 2015


About Manufacturer Apple
Official Name iMac (21.5-inch Retina 4K, 3.3GHz Intel Core i7, Late 2015)
Type Apple MAC
Form-factor All-in-one desktop computer
Display Type Retina 4K display with IPS technology
Size 21.5-inch (diagonal)
Resolution 4096-by-2304
Touchscreen No
Platform Family Mac
OS macOS High Sierra
CPU 3.3GHz quad-core Intel Core i7- 5775R “Broadwell” (Turbo Boost up to 3.8GHz)
GPU Intel Iris Pro Graphics 6200
Memory RAM 8/16 GB
HDD 1TB (5400-rpm) hard drive
Configurable up to 2TB Fusion Drive or 512GB of flash storage (SSD)
Comms Wi-Fi 802.11ac Wi-Fi wireless networking
IEEE 802.11a/b/g/n compatible
Bluetooth Bluetooth 4.0 wireless technology
WLAN 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)
USB Four USB 3 ports (compatible with USB 2)
Audio Stereo speakers
Dual microphones
3.5 mm headphone jack
Video Two Thunderbolt 2 ports
Mini DisplayPort output
Support for HDMI, DVI, VGA, and dual-link DVI (adapters sold separately)
Body Dimensions 17.7 x 20.8 x 6.9 inch
Weight 12.5 lb
Features Camera FaceTime HD camera
Input Magic Keyboard
Magic Mouse 2
Magic Trackpad 2
Expansions SDXC card slot
Kensington lock slot
Optical drive None

Model Identifiers

imac 21 5 inch retina 4k late 2015 300x274 - iMac (21.5-inch Retina 4K, 3.3GHz Intel Core i7, Late 2015)
Model IdentifieriMac16,2
Model NumberA1418 (EMC 2833)
Part NumberMK452LL/A
Family21.5-inch Retina 4K, Late 2015
Dimensions17.7 x 20.8 x 6.9 in
Weight12.5 pounds
Processor3.1Ghz Intel Core i5
Display Size21.5 inches
Storage1TB HDD
See alsoSell your iMac (21.5-inch Retina 4K, 3.1Ghz Intel Core i5, Late 2015) online now

Price, Discontinuation

Price: Starting at $1699 Discontinued: June 5, 2017


  • The number of pixels for a Retina Display is about 300 PPI, according to Steve Jobs. Apple has just simply converted a device’s display to Retina by doubling the number of pixels in each direction (excluding the iPhone 6 Plus, when the number was tripled). Thus the total resolution has been quadrupled, creating a sharper interface at the same physical dimensions.



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