Hi,
I download Arduino into my MAC and when I tried to locate my serial port I was only able to see two options. They are as follow:
Please help me to choose which one is right to choose.
I have also attached a file showing my serial port.
Mac OS X El Capitan now needs signed drivers.
Since Arduino use no drivers chips (Serial is handled with Atmega chip), serial can't work on this Operating System.
After long long researchs, the only solution I found is to use a FTDI breakboard. It work's fine for me on El Capitan.
Description is here :
https://forum.arduino.cc/index.php?topic=351999.msg2659688#msg2659688
Thank you 
