Help with Big Sur (11.6.0) on Dell 5820-X

Hi.

Following on from this post https://www.tonymacx86.com/threads/dell-precision-5820-xeon-w2125.263298/page-9 I'm trying to install MacOS BigSur (11.6.0) on my machine (Dell 5820, Intel Core i7-9800X, Radeon Pro WX4100 GPU)

I'm stuck in this place right now. Can anyone help?

Author: holdy89