iMac Pro j137 unable to jailbreak.

[unlockerman]

Tell us about your setup:

1. What iDevice are you using? iMac Pro 1,1 2017 J137
2. On what version of iOS is it? iBridge 5.1
3. What version of checkra1n are you using? 0.11.0 to 0.12.2
4. What is your host system (OS version? Hackintosh? VM? etc.)? Sierra not T2, Big Sur T2, Catalina T2 device’s.
5. How are you connecting to the device (USB-A? USB-C? Apple/3rd party cable? Through a USB hub?)? USB-A to USB-C and USB-C to USB-C (USB-C both cable tested Apple and 3rd) USB-A to USB-C Samsung cable. What are the steps to reproduce the issue? Device Restored in Apple Configurator and idevicerestore.. hombrew,libimobiledevice re instaled.

Jailbreak done another device of the same model But iBridge 4.x

Did you see a popup on the device stating it entered "Safe Mode" due to an error? No
Does the issue also occur if you tick "Safe Mode" in the checkra1n options? Tested but hat have result Any other info, error logs, screenshots, ...?

: Waiting for DFU devices : Checking if device is ready : Setting up the exploit (this is the heap spray) : Right before trigger (this is the real bug setup) [!]: Timed out waiting for bootstrap upload (Likely caused by an incompatible tweak, to enable Safe Mode pass the '-s' option) (error code: -20) [!]: Unknown error (error code: -20)

https://prnt.sc/x8kbav https://prnt.sc/x8kd6c https://prnt.sc/x8ki97

Thank you so much!

[Siguza]

Seems like a duplicate of #1952.