MacRumors reports Restoring a Bricked iMac Pro Requires a Second Mac and Configurator 2:
"If an iMac Pro becomes unresponsive and requires restoring, like if there's a power failure during a software update, there are a special set of instructions iMac Pro users must follow, which require a secondary Mac."
As outlined in an Apple Configurator 2 support page, an iMac Pro restore requires a second Mac running macOS High Sierra with internet access and Apple Configurator 2.6 or later installed.
[...] This restore process is similar to what must be done for an iPhone or iPad that is unresponsive, and it is necessary due to the extra security afforded by the Apple-designed T2 chip ... [which] integrates the system management controller, image signal processor for the camera, audio controller, SSD controller, a Secure Enclave, and a hardware encryption engine.
(Score: 0) by Anonymous Coward on Monday December 18 2017, @04:02PM
It would be cooler if I could access the same image on my own home network with that file server I made with the 10gb ethernet and stuff that is cool, so that I can learn how it all works and be good at it and...
I don't need the internet to install a local file image, ok? My internet is 10mb down 1mb up; slower than most cities on that list above of where the apple stores are.
There are people out there that actually still try to learn how it works, since 3 hours of learning can save lots of "I pressed the button but it still doesn't work" problems later in life.