I noticed that there are several threads where people are looking for drivers for various Realtek-based wifi dongles for OS X 10.11 El Capitan. After 3 days of searching, I found some drivers in the Italian forum on Insanely Mac (thank you, Google Translate!) It worked for me on a fresh install of 10.11.3 for my HP EliteBook 840 G2 and an RTL8188CUS chipset wifi dongle. Hopefully it will be useful to others.
These drivers were supposedly downloaded from the Realtek web site, but that...
Realtek Wifi USB dongle drivers for El Capitan (attached)
These drivers were supposedly downloaded from the Realtek web site, but that...
Realtek Wifi USB dongle drivers for El Capitan (attached)