Finally! Here's how I resolved the issue without removing the graphic card.
Bec. I knew how close I am to the finish line before getting black screen not without nv_disable=1
Download the latest El Capitan 10.11.3
Download the latest Nvidia Graphic Driver
Create bootable usb
Boot clover with nv_disable=1
Install the OSX
Install the latest Nvdia graphic driver provided for 10.11.3 El Capitan
Edit the AppleGraphicsControl.kext which is located at
My board-id appears to be iMac17,1 in the config.plist
Find these lines and replace it's entry to "none"
Rebuild the kext using kextutility tool.
Reboot with nvda_drv=1
Then that's it!
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