iMac20,1

iMac (Retina 5K, 27-inch, 2020)iMac2020EFI 64-bitApple T2

iMac20,1 Gigabit Ethernet BTO · 10Gb Ethernet 0 of 2 configurations tested Cards Matrix

Criterion	Gigabit Ethernet	BTO · 10Gb Ethernet	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)

Last Intel iMac and the only T2 iMac. Apple T2 chip. The SSD controller, audio, FaceTime camera and ambient light sensor are reached through the T2 bridge (apple-bce binds on real Linux machines).
Booting a non-Apple OS requires Startup Security Utility (in Recovery) set to "No Security" and "Allow booting from external or removable media". The Broadcom Wi-Fi/Bluetooth chip needs Apple's firmware files.
Very few Linux hardware probes exist for this model.
iMac20,1 covers the Radeon Pro 5300 and 5500 XT configurations; the 5700/5700 XT upgrades report iMac20,2.

Sources (8) and identifiers

Board IDs: Mac-CFF7D910A743CAAF