With your device already in (black screen, not recognized by iTunes/Finder normally), execute:
The jump from the original ipwnder to ipwnder-v1.1 was not arbitrary. Here is a breakdown of the critical improvements in version 1.1: ipwnder-v1.1
Devices with A12 chips or later (iPhone XS, XR, 11, 12, etc.) are not compatible with ipwnder-v1.1. The Checkm8 exploit was patched in hardware starting with A12. With your device already in (black screen, not
Most Windows tools fail because they can't handle the exploit properly. iPwnder v1.1 is the solution. It is specifically designed to handle the DFU handshake for Windows users. not recognized by iTunes/Finder normally)
make sudo make install