Not able to start after upgrading OSX to 10.11 EI Capitan

[1e0ng]

$  proximac start -c proximac.conf 
/usr/local/proximac/proximac.kext failed to load - (libkern/kext) not loadable (reason unspecified); check the system/kernel logs for errors or try kextutil(8).
Kernel extension cannot be loaded! Maybe it is already loaded so you have to unload it first. Or installing third-party kext is now allowed on your OS.

[vayn]

@csujedihy explained how to use proximac on OSX 10.10+

If you plan to use Proximac on OSX 10.10+, please run sudo nvram boot-args="debug=0x146 kext-dev-mode=1".

Please try again.

[1e0ng]

@vayn I tried. It doesn't work. It works on 10.10, but after I upgrading my system to 10.11, it doesn't work any more, even though I rerun sudo nvram boot-args="debug=0x146 kext-dev-mode=1".

[csujedihy]

Try this:

in Recovery mode:
csrutil disable
https://forums.developer.apple.com/thread/3981

[1e0ng]

@csujedihy It works. Thanks!