@Ethaniel , thank you, now I will deal with UEFI Shell and RUFUS. Unfortunately, it’s not fast.
I confirm that Apple NVMe device is disk 2 on the screenshot. It is SM0128L - 128GB:
https://beetstech.com/product/imac-27-in…b-ssd-661-07312
Please look at the screenshot of Device Manager.
Best regards, Dmitry
Device Manager.zip (58.2 KB)