I'll be using tonymac's El Capitan guide as a reference. Many builds have found success with it and it comes with decent illustrations. The guide can be found here: http://ift.tt/1Qz1o9g

I hope my instructions will clarify anything left ambiguous.

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Preparing to Installing OSX

Don't need to remove memory or graphics card.

Create a bootable USB using Unibeast. This is done by formatting the USB through Disk Utility first, then running Unibeast. I had to switch to a different USB to get it working.

Settings for Unibeast:

  • El Capitan
  • UEFI
  • Don't inject graphics

BIOS settings:

  • In order to get into BIOS, on keyboard press DEL. To boot from specific drive, press F12. (Varies based on BIOS)
  • Once in BIOS, Set optimized defaults, then disable vt-d. No other settings need to be configured, though might need to enable windows setting for multiboot. (explained later)

If using an external Nvidia GPU, use boot flag nv_disable=1 until Nvidia's alternate drivers are installed.

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Installing OSX

Boot from Unibeast USB (will be referred simply as OSX USB from now on) and install OSX. At some point in the installation, a restart is required. Afterward, boot into Macintosh HD using OSX USB again to complete installation. This is because MacHD doesn't have config.plist or kexts yet at this point.

Open Clover Configurator, mount EFI of MacHD (should be the first drive, numbered 0), copy included config.plist into MacHD's EFI.

Install El capitan Post Install Tools (Contains Clover UEFI and customac pkg with kexts) Actually this is useless, follow the next step.

Install fakesmc, intelmausi, and all other kexts manually by dragging them into /clover/kexts/other Delete all other numbered directories (OSX versions) in /clover/kexts/

If using a dedicated GPU, install drivers for it. In this case, it's nvidia alternate driver http://ift.tt/1KLDfKx

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Mulltiboot (Installing Windows)

This part requires creating a Windows installer USB enabled for UEFI/GPT. The tool to use is Rufus (Windows only) so create it from either a virtual machine, etc. The target Windows drive needs to be formatted as GPT. With both MacHD and target drive connected, boot into MacHD (OSX), launch disk utility and delete the target drive. This will format it as GPT.

When installing, delete the entire partition and reinstall (there will be errors saying Windows unable to install on non NTFS format otherwise. The drive still contains GPT partition map). The following BIOS flags are required, provided here. http://ift.tt/1O7n9pm BIOS > BIOS Features > Windows 8 Features : Set this to "Windows8" BIOS > BIOS Features > CSM Support : Set this to "Never" BIOS > BIOS Features > Secure Boot : Set this to "Disabled"

After setting this, BIOS Boot Option Priorities looks so clean, containing only three things:

  • Boot Option #1 : UEFI OS
  • Boot Option #2 : Windows Boot Manager
  • Boot Option #3 : Disabled (Could be remaining option Mac OS X)
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