iMac19,1

iMac (Retina 5K, 27-inch, 2019)iMac2019EFI 64-bitno security chip

iMac19,1 Pro 570 / 575 / 580 / 570X / 575X / 580X Pro Vega 48 0 of 2 configurations tested Cards Matrix

Criterion	Pro 570 / 575 / 580 / 570X / 575X…	Pro Vega 48	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
Discrete 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 8 passed
Built-in speakers	Untested	Untested	2
Built-in microphone	Untested	Untested	2
Headphone / analog 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 8 passed
USB-A ports	Untested	Untested	2
USB-C / Thunderbolt 3 ports (USB data)	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)

Audio is a Cirrus Logic CS8409 codec; on many observed machines Linux fell back to the generic HDA parser, so audio needs attention in testing.
No T2 chip, but the Wi-Fi/Bluetooth is the same BCM4364 used in T2 Macs.

Sources (8) and identifiers

Board IDs: Mac-AA95B1DDAB278B95