Hello everyone, this took me some time but I finally got OS X Yosemite working on the GIGABYTE GA-Z97X-UD3H. Everything works fine with a few errors here and there but I've got everything sorted. iMessage and FaceTime obviously don't work with Chimera but you can follow this guide to fix it:
How to fix iMessage
Specifications:
Intel Core i7-4790K (Stock at 4GHz)
GIGABYTE GA-Z97X-UD3H-BK
G.Skill Sniper Series 16GB (2x8GB) DDR3 1866MHz RAM
EVGA GTX 960 SuperSC (2GB GDDR5 VRAM)
Crucial M500 240GB SSD (Windows 8.1 Pro)
Crucial MX100 256GB SSD (Mac OS X Yosemite 10.10.2)
Western Digital Caviar Blue 1TB Hard Drive (Storage)
Fractal Design Define R4 (Black Peral)
Corsair RM Series 650W Power Supply
ASUS USB N13 USB WiFi Adapter (RaLink Wireless Utility)
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IMPORTANT: You most likely will get a boot0 error. Don't worry because there's a fix however I recommend doing it before install OS X and after formatting the drive you're going to install OS X on. You can follow this guide to fix the problem:
boot0 Error: The Official Guide
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Install Guide (with) Graphics Card
IMPORTANT: Remove ALL Stick(s) of RAM except for ONE stick
OPTIONAL: Unplug all HDDs and SSDs except for one you're going to install OS X on
Bootflags: -x -v nv_disable=1 -no -zp
OPTIONAL: After you install OS X and go through setting up your user account. Shut down the computer and remove your GPU then boot up with bootflags: -x -v then install MultiBeast and the NVIDIA Web Driver. This process makes installing drivers easier.
Install MultiBeast with these options:
Quick Start > DSDT Free
Drivers > Audio > Realtek ALCxxx > ALC1150
Drivers > Disk > 3rd Party SATA
Drivers > Disk > TRIM Enabler > 10.10.x TRIM Patch (SSD ONLY)
Drivers > Misc > FakeSMC v6.14.1364
Drivers > Misc > FakeSMC v6.14.1364 Plugins
Drivers > Misc > USB 3.0 - Universal
Drivers > Network > Intel > AppleIntelE1000e v3.0.4.1a
Bootloaders > Chimera v4.0.1
Customize > Boot Options > 1080p Display Mode
Customize > Boot Options > Basic Boot Options
Customize > Boot Options > Hibernate Mode - Desktop
Customize > Boot Options > Kext Dev Mode
Customize > Boot Options > Verbose Boot
Hit Install and watch the magic happen!
You need the "Quadro & GeForce Mac OS X Web Driver Release 343.02.02" from NVIDIA's website. Once you download, just install and before you restart, go into settings and make sure you have "NVIDIA Web Driver" selected.
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Install Guide (without) a Graphics Card [Intel HD Graphics]
IMPORTANT: Remove ALL Stick(s) of RAM except for ONE stick
OPTIONAL: Unplug all HDDs and SSDs except for one you're going to install OS X on
Bootflags: -x -v
Install MultiBeast with these options:
Quick Start > DSDT Free
Drivers > Audio > Realtek ALCxxx > ALC1150
Drivers > Disk > 3rd Party SATA
Drivers > Disk > TRIM Enabler > 10.10.x TRIM Patch (SSD ONLY)
Drivers > Graphics > Intel Graphics Patch for Mixed Configurations
Drivers > Misc > FakeSMC v6.14.1364
Drivers > Misc > FakeSMC v6.14.1364 Plugins
Drivers > Misc > USB 3.0 - Universal
Drivers > Network > Intel > AppleIntelE1000e v3.0.4.1a
Bootloaders > Chimera v4.0.1
Customize > Boot Options > 1080p Display Mode
Customize > Boot Options > Basic Boot Options
Customize > Boot Options > Hibernate Mode - Desktop
Customize > Boot Options > Kext Dev Mode
Customize > Boot Options > Verbose Boot
Hit Install and watch the magic happen!