Missing 'bsdiff4' when downgrade iPhone 5s to 10.3.3

[hoangluong27]

I've tried many ways to downgrade my iPhong 5s from 12.4.9 to 10.3.3. But Vieux showed that I missed something relate to ModuleNotFoundError: No module named 'bsdiff4' at ./vieux -i "PATH/TO/.ipsw" step

Computer (please complete the following information): REQUIRED -

• Computer Model: iMac 2015 27'
• MacOS Version: Big Sur 11.0.1
• Python Version: Python 2.7.16 & 3.8.2
• Vieux Version: Master

iOS Device (please complete the following information): REQUIRED -

• Device: iPhone6,2
• Desired Version: iOS 12.4.9 to iOS 10.3.3

[mstaack]

i used:

export ARCHFLAGS="-arch x86_64"
python3 -m pip install --user -r requirements.txt

[hoangluong27]

i used:

export ARCHFLAGS="-arch x86_64"
python3 -m pip install --user -r requirements.txt

It's not work with me, still in the same problem

[hoangluong27]

hello, anyone here?

[lvl888]

hello, anyone here?

which version of macOS and python 3.8 or 3.9? On my big sur with version python 3.9 it does not give such an error, but with python 3.8 it works.

[bkchucnc]

Downgrade python to 3.6.0