[Guide] Yosemite installation on a Late-2015 build
Components of the Build
Intel Core i5-4690K: ~$240.98
Cooler Master Hyper 212 Evo: ~$34.88
Gigabyte GA-Z97-HD3: ~$197.79
Crucial 1x8GB DDR3-1600: ~$49.89
Samsung 850 EVO 250GB: ~$99.99
Seagate Barracuda 1TB 7200: ~$46.88
EVGA GeForce GTX 750 Ti SC: ~$124.99
Thermaltake Chaser A31 Thunder: ~$79.99
EVGA 500W 80+ PSU: ~$36.99
Total Cost: ~$912.38
Multibeast 7.5 for Yosemite
Nvidia Web Drivers
If you do not own a Mac system, then you'll need to source TransMac.
If you do own a Mac system, then you'll need to restore the Yosemite Zone DMG file to your flash drive using the Disk Utility app.
If you do not own an 8+ GB flash drive, then you'll need to source one to restore Yosemite to. I would recommend at least a 16 GB flash drive that way you could restore future images of OS X such as El Capitan and Sierra. Do not forget to save a copy of Multibeast on the flash drive, otherwise you'll have to source Multibeast without a working ethernet connection.
Reboot the system and hold down the DELETE key to enter the BIOS. Once in the BIOS, you'll need to press the F7 button to restore any custom BIOS settings to their factory defaults and then press F2 to enter the class mode.
When you're in classic mode, you will want to disable VT-d, set xHCI to auto mode, activate xHCI hand-off, activate EHCI hand-off, set SATA to AHCI, and set the memory mode to a more stable setting. (There should be 3 choices, choose the setting that has "stable" or "secure" in its name)
Press F10 to save your changes and reboot the system. This time you want to hold down the F12 button to enter the boot device selection screen and choose your flash drive that has the Yosemite install image on it.
Press TAB on the keyboard to enter boot flags and enter the following flags without the quotation marks: " -v -x GraphicsEnabler=No nv_disable=1 "
Now you should sit back and hopefully you'll boot into the OS X installer and not into a kernel panic. (You'll be at a high risk of kernel panics throughout the installation process, so bear that in mind please)
Now you will want to enter the Disk Utility app from the top menu of the OS X installer and erase the Samsung 850 EVO storage device. (You can not make an HFS+ partition alongside any Windows partitions on your SSD)
Now you can exit the Disk Utility app by pressing WIN+Q (which equates to the COMMAND+Q on a macintosh keyboard) and you can select the SSD as your target installation drive.
Do not customize the Yosemite setup, just click on the SSD as your target installation drive and continue to the most important step of the installation; getting the OS X files on to your SSD.
Sit back and relax until the OS X installer prompts you to reboot, and then let it reboot. This time; if you don't have any other OS installation disks inserted into your computer, it should boot into the default Yosemite Zone bootloader.
You want to enter the same boot flags as you did on step 4 of this guide. " -v -x GraphicsEnabler=No nv_disable=1 "
Now you'll be finishing up the installation of OS X, you don't have to bother setting up with an Apple account since we'll be disabling auto-updates to ensure that any software upgrades won't brick your hackintosh installation.
Once you're on the desktop you'll notice a few things: There is no transparency, the resolution is small, QE/CI isn't functioning, audio isn't functioning, and the ethernet isn't functioning. If that's the case, then good.
Now you'll want to copy Multibeast from the Yosemite installer flash drive to the OS X desktop and run it. Select DSDT Free from the Quick Start area and then head on over to the Drivers area to select the following: Realtek ALC887 audio (the modern version should suffice), Realtek RTL8111 (version 2.X should suffice), SSD Trim support, and USB 3.0 support. Then you'll want to proceed to the Build tab to install those kexts.
Once Yosemite Zone is finished setting things up (the notifications should tell you when it's finished), you'll want to reboot the system and this time you should see a different boot screen. Press the TAB button like before and begin typing in the following boot flags: " -v -f "
Now you should have working sound, working ethernet, you should be able to plug in a USB 3.0 device into a USB 3.0 port without OS X freezing up, and you should have TRIM support for your SSD (which helps out heaps when dealing with file transfers).
Now you'll want to head on over to Google to grab the Nvidia drivers for OS X and install them. Reboot when prompted and enter the same bootflags as you did in step 14 to get back into the OS X installation. Then you'll want to go into the System Preferences panel and select NVIDIA Driver Manager. Click on the lock icon in the bottom-left corner of the window if the settings are locked, and proceed to select the NVIDIA Web Driver option and reboot again.
Use the same boot flags as you did in step 14 and you should notice that most of the graphical glitches are gone and that the screen resolution should now match the monitor's native resolution. You should also see QE/CI functioning and transparency should be enabled.
Now to disable auto-updates from messing up your installation of Yosemite, you'll want to head over to the System Preferences panel and select the App Store option. Untick all of the boxes and you should be finished with your installation of OS X Yosemite.
Screenshot of a Finished Installation