Disclaimer

You cannot use this EFI as it is.

At least you have to change your Serial Number, which is located in EFI/OC/config.plist, search for PlatformInfo, look for keys: MLB, ROM, SystemSerialNumber, SystemUUID. It’s super easy, more on that in Dortania‘s guide.

Maybe you have to check for other things, if you have different hardware, e.g. iGPU instead of dGPU. Don’t hesitate to ask if you have any questions.

2014 Haswell

Guide Used: OpenCore Desktop Guide
Installation Date: Mar 7, 2020

Current Version

Open Core: 0.6.3 f152c95 released on Nov 2, 2020 — Sanity Check Result
macOS Catalina, v.10.15.7 19H2 updated on Sep 26, 2020
SMBIOS: iMac14,2

Hardware

MB GA-Z87MX-D3H @ BIOS F6 (of F7)
CPU Intel Core i7-4770 4C/8T @ 3.4 GHz
iGPU Intel HD Graphics 4600
dGPU Sapphire Radeon RX 580 4 GB
RAM 16 GB 1866 MHz DDR3
Audio Codec Realtek ALC892
Ethernet 00:00:00:00:00:00 I217-V from Intel
Wi-Fi + Bluetooth 00:00:00:00:00:00 BCM43602 802.11ac

Kexts

AppleALC
IntelMausi
Lilu
SMCProcessor
SMCSuperIO
VirtualSMC
USBInjectAll
WhateverGreen

SMBIOS Info

         Model: iMac14,2
      Board ID: Mac-2700000000000000
    FW Version: 141.0.0.0.0
 Hardware UUID: 00000000-0000-0000-0000-000000000000
 Serial Number: 000000000000
       Country:  D25 - Unknown
          Year:    N - 2014
          Week:    V - 50 (10.12.2014-16.12.2014)
          Line:  000 - 000 (copy 1)
         Model: 0000 - iMac14,2
   SystemModel: iMac (27-inch, Late 2013)
         Valid: Possibly
     System ID: 00000000-0000-0000-0000-000000000000
           ROM: 000000000000
           MLB: 00000000000000000

BIOS Settings

Home

Home/Performance: Defaults
Performance/Frequency: Defaults
Performance/Memory: System Memory Multiplier is 18.66
System: Defaults

BIOS Features

All defaults

OS Type: Windows 8

Disable:

Fast Boot

Enable:

Peripherals

Device Config

Internal Graphics Memory Size: 64M
DVMT Pre-Allocated (iGPU Memory): MAX
EHCI Hand-off Enabled

fakiehmaulana/Hackintosh-GA-Z87MX-D3H