Did you end up finding anything in the end?
So far as i searched seemed like either outdated or unsupported.
For a while on Yosemite until drivers where in just unpackaged the installer for the drivers, modified the installer if statements that check for OS X version, then packaged it and installed as normal which kinda worked, as there where issues with if unplugging the device it would freeze the system, sometimes it would just freeze on boot and other issues with launching the network tool for them.
For Yosemite and also now for El Capitan have tried contacting D-Link support, which btw is total ****, no help or replies received. My best bet is to try searching different manufacturers that use the same Realtek chipset for El Capitan support