iMac16,2

iMac (Retina 4K, 21.5-inch, Late 2015)iMac2015EFI 64-bitno security chip

iMac16,2 1920×1080 Retina 4K 0 of 2 configurations tested Cards Matrix

Criterion	1920×1080	Retina 4K	Config count
Boot · a failure here makes a config Unsupported 0 of 6 passed
Stock installer boots via 64-bit EFI	Untested	Untested	2
Internal storage detected and installation completes	Untested	Untested	2
Installed system starts, restarts and shuts down cleanly	Untested	Untested	2
Graphics 0 of 4 passed
Integrated GPU acceleration	Untested	Untested	2
External display output	Untested	Untested	2
Display 0 of 4 passed
Internal display at native resolution	Untested	Untested	2
Display brightness control	Untested	Untested	2
Power 0 of 2 passed
Sleep and wake	Untested	Untested	2
Audio 0 of 10 passed
Built-in speakers	Untested	Untested	2
Built-in microphone	Untested	Untested	2
Headphone / analog audio output	Untested	Untested	2
Optical digital audio output	Untested	Untested	2
Audio over HDMI / DisplayPort	Untested	Untested	2
Camera 0 of 2 passed
Built-in webcam	Untested	Untested	2
Networking 0 of 6 passed
Wi-Fi	Untested	Untested	2
Bluetooth	Untested	Untested	2
Ethernet	Untested	Untested	2
Ports 0 of 6 passed
USB-A ports	Untested	Untested	2
Thunderbolt devices (storage, docks, hotplug)	Untested	Untested	2
SD card reader	Untested	Untested	2
Thermal 0 of 4 passed
Temperature sensors report under load	Untested	Untested	2
Fans respond to load	Untested	Untested	2

Research notes (unverified)

Shared by the non-Retina 21.5-inch (MK442, 1920x1080) and the first Retina 4K 21.5-inch (MK452). Both use Iris Pro 6200.

Sources (8) and identifiers

Board IDs: Mac-FFE5EF870D7BA81A