Hi,
Please allow this thread. I know that you provided how-to wireless and Kali but I can not find the answer that I am looking for.
I have spent over a week trying to figure out how to enable my wireless card ( Broadcom BCM43xx 1.0 (7.21.94.136.1a1) ) on Kali Linux 2.0 (usb dual boot) whilst running Macbook Pro with retina (El Capitan version 10.11.2). I have asked in here before but I am not getting any closer. I can not connect to the wireless nor wired when I boot in Kali Linux and so I have no way of doing anything online. Can I download the required wireless drivers, put on a usb and boot into Kali Linux and download those drivers? Please I am a bit of a noob and would be very grateful for any help.