CyberneticEntomologist, kvasir,
After the drivers are installed on El Capitan (10.11.3), you should see a new network device in the System Preferences->Network section. The device will be called "USB 10/100 LAN" and will initially be "Not Connected". Unlock the network settings and make sure that the "Configure IPv4:" is set to "Using DHCP". It is important to unlock the settings, I was not able to get the device connected when it was locked. I have not researched why. You can then connect the USB cable into the Pineapple TETRA. I am using a MacBook Pro that has enough power on the USB 3.0 port [up to 900 mA (milliamps) at 5 V (Volts)] to power on and use the Pineapple. You will not want to stress the single USB port if you are stressing the radios. Now wait for the boot sequence to finish and the blue light to remain on. It usually takes a minute or two after the blue light is on constantly for the DHCP configuration information to be sent to the computer. See this web page https://cs.wmich.edu/~OODA/dhcp_seq.giffor more information about the handshake. When the client is successfully connected, the red dot to the left of the "USB 10/100 LAN" text will turn green and you can connect to the WiFi Pineapple web server on http://172.16.42.1:1471/ or ssh root@172.16.42.1.
I attempted a screenshot, but I was unable to figure out how to upload the image to this web site for reference.