Old timer here. Seems El Capitan has disabled quite a few graphics cards.
After 49 hours of perilous straining to get the beast advance from Boot Screen to Installer, to completing install, I am currently stuck with a black / Blank Screen after booting to desktop or if it is the Setup Wizard.
I had a very refined DSDT and a perfected Clover config. Now none of it seems to work.
I replaced the refined DSDT to a very basic DSDT extracted from booting into Windows and patching it using MaciASL.
It has added GFX (peg0), HDMi out & audio edits - injection. However, I do not use ALC onboard audio since I have a Creative X-Fi USB sound card with 5.1 speakers.
Now, can someone please shed light on why El Capitan hates nVidia 560Ti 1GB Direct CUII model...???
Following is all I have done or tried before reaching out for help:
1) Updated Clover. <- everything related to this is done and dealt with
2) Switched SMBIOS.plist from iMac13.2 to Macpro6,1 <- this actually got my Machine to boot without the dreaded ACPIPlatform Error. found from a different user's query.
Currently using iMac13,2 SMBIOS, as it supports 560Ti unlike MacPro SMBIOS whichhave that AGDP bug which results in black/blank screen post boot.
3) Tried different DSDTs <- self made / modified. but all with GFX DSDT injection since that is what I am following since day 1 of Hacckintosh.
4) Lastly, tried NVIDIA WEB Drivers latest version. NOTE: It is hell getting to install these even with the macmodel bypass. It didn't work for me. I had to manually extract using my backup Hackintosh box using Pacfist. and then, boot Installer -> use Terminal to manually copy them to SLE. rebuild cache using touch SLEx. Used nvda_drv=1.
Thus, I can freely switch between native drivers & Nvidia Web drivers.
Still Black Screen. Can someone "Please help", and post if got sucess on 560Ti....?