I am a Arduino newbie and I am working on Mac with El Capitan.
I would like to know when signed drivers for El Capitan will be available?
IMHO, disabling the kernel security in OSX is not a good solution.
EDIT : I just discovered that i have a chinese clone with CH340G chip. I then just download the signed driver from http://kig.re/2014/12/31/how-to-use-arduino-nano-mini-pro-with-CH340G-on-mac-osx-yosemite.html and the port is recognized with the Arduino IDE. topic closed!