My external GPU was running just fine with Yosemite but installing El Capitan broke it. Lucky for me I've found automate-eGPU and after some experimenting I've found that version 0.9.6 works:
- Disable SIP
- Unistall old configuration. For example:
git clone https://github.com/goalque/automate-eGPU.git
cd automate-eGPU
chmod +x automate-eGPU.sh
# maybe the following is not necessary
sudo ./automate-eGPU.sh
# Reboot
sudo ./automate-eGPU.sh -uninstall
# Reboot
- Install and run version 0.9.6 of automate-eGPU
git checkout ada4d92ce0d04e1c0
chmod +x automate-eGPU.sh
sudo ./automate-eGPU.sh
# Reboot