ERROR: No Apple device in DFU Mode 0x1227 detected after 30.00 second

[nikotidar]

Tested on iPhone 7 / iPhone9,3 with iOS 14.4.2

Log

BoAAAA :: ~/iPhone-Dev/PyBoot » python3 pyboot.py -i iPhone9,3 14.4.2 -b bootloader.png
PyBoot - A tool for tether booting Checkm8 vulnerable iOS devices by Matty, @mosk_i

Current version is: Beta 0.9.1
Make sure your device is connected in DFU mode
Checking theiphonewiki for 14.4.2 keys...
Found Keys!
Downloading 14.4.2's BuildManifest.plist
Extracting: BuildManifest.plist, from iPhone_4.7_P3_14.4.2_18D70_Restore.ipsw
Found multiple device models...
Which is your device?

1: d101ap
2: d10ap
3: d201ap
4: d20ap

Enter the number that corresponds with your device: 1
Device set to d101ap
Getting SHSH for signing images
Downloading and patching 14.4.2's iBSS/iBEC
Extracting: Firmware/dfu/iBEC.d10.RELEASE.im4p, from iPhone_4.7_P3_14.4.2_18D70_Restore.ipsw
Extracting: Firmware/dfu/iBSS.d10.RELEASE.im4p, from iPhone_4.7_P3_14.4.2_18D70_Restore.ipsw
Downloading 14.4.2's KernelCache
Extracting: kernelcache.release.iphone9, from iPhone_4.7_P3_14.4.2_18D70_Restore.ipsw
Downloading 14.4.2's DeviceTree
Extracting: Firmware/all_flash/DeviceTree.d101ap.im4p, from iPhone_4.7_P3_14.4.2_18D70_Restore.ipsw
Downloading 14.4.2's TrustCache
Extracting: Firmware/038-96130-065.dmg.trustcache, from iPhone_4.7_P3_14.4.2_18D70_Restore.ipsw
Downloading 14.4.2's AOPFW
Extracting: Firmware/AOP/aopfw-t8010aop.im4p, from iPhone_4.7_P3_14.4.2_18D70_Restore.ipsw
Downloading 14.4.2's ISP
Extracting: Firmware/isp_bni/adc-nike-d20.im4p, from iPhone_4.7_P3_14.4.2_18D70_Restore.ipsw
Downloading 14.4.2's CallanFirmware
Extracting: Firmware/D201_CallanFirmware.im4p, from iPhone_4.7_P3_14.4.2_18D70_Restore.ipsw
Downloading 14.4.2's MultiTouch Firmware
Extracting: Firmware/D201_Multitouch.im4p, from iPhone_4.7_P3_14.4.2_18D70_Restore.ipsw
Patching Kernel's type from krnl to rkrn
Patching TrustCache's type from trst to rtsc
Patching Devicetree's type from dtre to rdtr
Signing boot files
Exploiting device with checkm8
ERROR: No Apple device in DFU Mode 0x1227 detected after 30.00 second timeout. Exiting.
Place the device into DFU mode again and re-run Vieux