why always show Kernel extension load failed ?

[sangen]

my system is macos 10.12.3 ,
and under Recovery mode Run " csrutil disable", then Reboot

but it still show Kernel extension load failed

[Yan Huang]

Now there are some compatibility issues on 10.12.3, and things could not work even if kernel extension is correctly loaded.
Sorry for this inconvenience, for simple emulation cases, you could use "Network Link Conditioner" provided by osx itself.
I'll try to fix this later when have time.