Last modified: Wed Jun 03 2020 14:35:16 GMT+0000 (Coordinated Universal Time)

Bulldozer(15h) and Jaguar(16h)

  • Supported version: 0.5.9

Table of Contents:

Starting Point

So making a config.plist may seem hard, its not. It just takes some time but this guide will tell you how to configure everything, you won't be left in the cold. This also means if you have issues, review your config settings to make sure they're correct. Main things to note with OpenCore:

  • All properties must be defined, there are no default OpenCore will fall back on so do not delete sections unless told explicitly so. If the guide doesn't mention the option, leave it at default.
  • The Sample.plist cannot be used As-Is, you must configure it to your system
  • DO NOT USE CONFIGURATORS, these rarely respect OpenCore's configuration and even some like Mackie's will add Clover properties and corrupt plists!

Now with all that, we'll need some things to get started:

  • ProperTree: For editing our config, this editor has some super useful tools for OpenCore
  • GenSMBIOS: For generating our SMBIOS
  • Sample.plist: This is found under the Docs folder of the release download
  • AMD Kernel Patches: Needed for booting macOS on AMD hardware(save these for later, we'll go over how to use them below)

Now with those downloaded, we can get to really get started:

  • Grab the Sample.plist and rename to config.plist
  • Open your new config.plist in ProperTree
    • macOS: ProperTree.command
    • Windows: ProperTree.bat
  • Run the Clean Snapshot function(Cmd/Ctrl + Shift + R and point it at your EFI/OC folder),
    • This will remove all the entries from the config.plist and then adds all your SSDTs, Kexts and Firmware drivers to the config
    • Cmd+R is another option that will add all your files as well but will leave entries disabled if they were set like that before, useful for when you're troubleshooting

And now you're ready to configure it!

And read this guide more than once before setting up OpenCore and make sure you have it set up correctly. Do note that images will not always be the most up-to-date so please read the text below them, if nothing's mentioned then leave as default.




This is where you'll add SSDTs for your system, these are very important to booting macOS and have many uses like USB maps, disabling unsupported GPUs and such. And with our system, its even required to boot. Guide on making them found here: Getting started with ACPI

Required_SSDTs Description
SSDT-EC-USBX Hides the Embedded controller and creates a fake one for macOS, *needed for all Catalina users and recommended for other versions of macOS. This SSDT also has a second function, USBX. This is used for forcing USB power properties, requires SSDT-EC so this just jumbles them together. A pre-built can be found here if you have issues: SSDT-EC-USBX-DESKTOP

Note that you should not add your generated DSDT.aml here, it is already in your firmware. So if present, remove the entry for it in your config.plist and under EFI/OC/ACPI.

For those wanting a deeper dive into dumping your DSDT, how to make these SSDTs, and compiling them, please see the Getting started with ACPI page. Compiled SSDTs have a .aml extension(Assembled) and will go into the EFI/OC/ACPI folder and must be specified in your config under ACPI -> Add as well.


This blocks certain ACPI tables from loading, for us we can ignore this


This section allows us to dynamically modify parts of the ACPI (DSDT, SSDT, etc.) via OpenCore. For us, our patches are handled by our SSDTs. This is a much cleaner solution as this will allow us to boot Windows and other OSes with OpenCore


Settings relating to ACPI, leave everything here as default.

  • FadtEnableReset: NO
    • Enable reboot and shutdown on legacy hardware, not recommended unless needed
  • NormalizeHeaders: NO
    • Cleanup ACPI header fields, only relevant for macOS High Sierra 10.13
  • RebaseRegions: NO
    • Attempt to heuristically relocate ACPI memory regions, not needed unless custom DSDT is used.
  • ResetHwSig: NO
    • Needed for hardware that fails to maintain hardware signature across the reboots and cause issues with waking from hibernation
  • ResetLogoStatus: NO
    • Workaround for OEM Windows logo not drawing on systems with BGRT tables.



This section is dedicated to quirks relating to boot.efi patching with OpenRuntime, the replacement for AptioMemoryFix.efi


This section is allowing spaces to be passthrough to macOS that are generally ignored, useful when paired with DevirtualiseMmio


Settings relating to boot.efi patching and firmware fixes, one we need to change is RebuildAppleMemoryMap

  • AvoidRuntimeDefrag: YES
    • Fixes UEFI runtime services like date, time, NVRAM, power control, etc
  • DevirtualiseMmio: NO
    • Reduces Stolen Memory Footprint, expands options for slide=N values and generally useful especially on HEDT and Xeon systems
  • DisableSingleUser: NO
    • Disables the use of Cmd+S and -s, this is closer to the behavior of T2 based machines
  • DisableVariableWrite: NO
    • Needed for systems with non-functioning NVRAM, you can verify here if yours works
  • DiscardHibernateMap: NO
    • Reuse original hibernate memory map, only needed for certain legacy hardware
  • EnableSafeModeSlide: YES
    • Allows for slide values to be used in Safe mode
  • EnableWriteUnprotector: YES
    • Removes write protection from CR0 register during their execution
  • ForceExitBootServices: NO
    • Ensures ExitBootServices calls succeeds even when the Memory Map has changed, don't use unless necessary
  • ProtectMemoryRegions: NO
    • Needed for fixing artifacts and sleep-wake issues, generally only needed on very old firmwares
  • ProtectSecureBoot: NO
    • Fixes Secure Boot keys on MacPro5,1 and Insyde firmwares
  • ProtectUefiServices: NO
    • Protects UEFI services from being overridden by the firmware, mainly relevant for VMs, Icelake and newer Coffee Lake systems
  • ProvideCustomSlide: YES
    • If there's a conflicting slide value, this option forces macOS to use a pseudo-random value. Needed for those receiving Only N/256 slide values are usable! debug message
  • RebuildAppleMemoryMap: YES
    • Generates Memory Map compatible with macOS, can break on some laptop OEM firmwares so if you receive early boot failures disable this
  • SetupVirtualMap: YES
    • Fixes SetVirtualAddresses calls to virtual addresses, not needed on Skylake and newer
  • SignalAppleOS: NO
    • Tricks the hardware into thinking its always booting macOS, mainly beneficial for MacBook Pro's with dGPUs as booting Windows won't allow for the iGPU to be used
  • SyncRuntimePermissions: NO
    • Fixes alignment with MAT tables and required to boot Windows and Linux with MAT tables, also recommended for macOS. Mainly relevant for Skylake and newer



Add: Sets device properties from a map.

By default, the Sample.plist has this section set for iGPU and Audio. We have no iGPU so PciRoot PciRoot(0x0)/Pci(0x2,0x0) can be removed from Add section. For audio we'll be setting the layout in the boot-args section, so removal of PciRoot(0x0)/Pci(0x1b,0x0) is also recommended from both Add and Block sections

TL;DR, delete all the PciRoot's here as we won't be using this section.



Add: Here's where you specify which kexts to load, order matters here so make sure Lilu.kext is always first! Other higher priority kexts come after Lilu such as VirtualSMC, AppleALC, WhateverGreen, etc. A reminder that ProperTree users can run Cmd/Ctrl + Shift + R to add all their kexts in the correct order without manually typing each kext out.

  • BundlePath
    • Name of the kext
    • ex: Lilu.kext
  • Enabled
    • Self-explanatory, either enables or disables the kext
  • ExecutablePath
    • Path to the actual executable is hidden within the kext, you can see what path your kext has by right-clicking and selecting Show Package Contents. Generally, they'll be Contents/MacOS/Kext but some have kexts hidden within under Plugin folder. Do note that plist only kexts do not need this filled in.
    • ex: Contents/MacOS/Lilu
  • PlistPath
    • Path to the info.plist hidden within the kext
    • ex: Contents/Info.plist

Emulate: Needed for spoofing unsupported CPUs like Pentiums and Celerons(AMD CPUs don't require this)

  • CpuidMask: Leave this blank
  • CpuidData: Leave this blank

Block: Blocks kexts from loading. Not relevant for us

Patch: This is where the AMD kernel patching magic happens. Please do note that KernelToPatch and MatchOS from Clover becomes Kernel and MinKernel/ MaxKernel in OpenCore, you can find pre-made patches by AlGrey(algrey#9303):

Kernel patches:

To merge:

  • Open both files,
  • Delete the Kernel -> Patch section from config.plist
  • Copy the Kernel -> Patch section from patches.plist
  • Paste into where old patches were in config.plist

Quirks: Settings relating to the kernel, for us we'll be enabling DummyPowerManagement, PanicNoKextDump, PowerTimeoutKernelPanic and XhciPortLimit. Everything else should be left as default

  • AppleCpuPmCfgLock: NO
    • Only needed when CFG-Lock can't be disabled in BIOS, Clover counterpart would be AppleIntelCPUPM. AMD users can ignore
  • AppleXcpmCfgLock: NO
    • Only needed when CFG-Lock can't be disabled in BIOS, Clover counterpart would be KernelPM. AMD users can ignore
  • AppleXcpmExtraMsrs: NO
    • Disables multiple MSR access needed for unsupported CPUs like Pentiums and certain Xeons
  • AppleXcpmForceBoost: NO
    • Forces maximum multiplier, only recommended to enable on scientific or media calculation machines that are constantly under load. Main Xeons benefit from this
  • CustomSMBIOSGuid: NO
    • Performs GUID patching for UpdateSMBIOSMode Custom mode. Usually relevant for Dell laptops. To be used in tandem with PlatformInfo -> UpdateSMBIOSMode -> Custom
  • DisableIoMapper: NO
    • AMD doesn't have DMAR or VT-D support so irrelevant
  • DisableRtcChecksum: NO
    • Prevents AppleRTC from writing to primary checksum (0x58-0x59), required for users who either receive BIOS reset or are sent into Safe mode after reboot/shutdown
  • DummyPowerManagement: YES
    • New alternative to NullCPUPowerManagement, required for all AMD CPU based systems as there's no native power management. Intel can ignore
  • ExternalDiskIcons: NO
    • External Icons Patch, for when internal drives are treated as external drives but can also make USB drives internal. For NVMe on Z87 and below you just add built-in property via DeviceProperties.
  • IncreasePciBarSize: NO
    • Increases 32-bit PCI bar size in IOPCIFamily from 1 to 4 GB, enabling Above4GDecoding in the BIOS is a much cleaner and safer approach. Some X99 boards may require this, you'll generally experience a kernel panic on IOPCIFamily if you need this. Note this shouldn't be needed on Mojave and newer
  • LapicKernelPanic: NO
    • Disables kernel panic on AP core lapic interrupt, generally needed for HP systems. Clover equivalent is Kernel LAPIC
  • PanicNoKextDump: YES
    • Allows for reading kernel panics logs when kernel panics occur
  • PowerTimeoutKernelPanic: YES
    • Helps fix kernel panics relating to power changes with Apple drivers in macOS Catalina, most notably with digital audio.
  • ThirdPartyDrives: NO
    • Enables TRIM, not needed for NVMe but AHCI based drives may require this. Please check under system report to see if your drive supports TRIM
  • XhciPortLimit: YES
    • This is actually the 15 port limit patch, don't rely on it as it's not a guaranteed solution for fixing USB. A more proper solution for AMD can be found here: AMD USB Mapping



Boot: Settings for boot screen (Leave everything as default)

  • HibernateMode: None
    • Best to avoid hibernation with Hackintoshes all together
  • PickerMode: Builtin
    • Sets OpenCore to use the builtin picker
  • HideAuxiliary: NO
    • Hides Recovery and other partitions unless spacebar is pressed, more closely matches real Mac behavior
  • ConsoleAttributes: 0
    • Sets OpenCore's UI color, won't be covered here but see 8.3.8 of Configuration.pdf for more info
  • PickerAttributes: 0
    • Used for setting custom picker attributes, use of this setting will be covered in Post-Install
  • PickerAudioAssist: NO
    • Used for enabling VoiceOver like support in the picker, unless you want your hack talking to you keep this disabled
  • PollAppleHotKeys: NO
    • Allows you to use Apple's hotkeys during boot, depending on the firmware you may need to use OpenUsbKbDxe.efi instead of OpenCore's builtin support. Do note that if you can select anything in OC's picker, disabling this option can help. Popular commands:
      • Cmd+V: Enables verbose
      • Cmd+Opt+P+R: Cleans NVRAM
      • Cmd+R: Boots Recovery partition
      • Cmd+S: Boot in Single-user mode
      • Option/Alt: Shows boot picker when ShowPicker set to NO, an alternative is ESC key
  • TakeoffDelay: 0
    • Used to add a delay for hotkeys when OpenCore is a bit to fast to register, 5000-10000 microseconds is the preferred range for users with broken hotkeys support
  • Timeout: 5
    • This sets how long OpenCore will wait until it automatically boots from the default selection

Debug: Helpful for debugging OpenCore boot issues(We'll be changing everything but DisplayDelay)

  • AppleDebug: YES
    • Enables boot.efi logging, useful for debugging. Note this is only supported on 10.15.4 and newer
  • ApplePanic: YES
    • Attempts to log kernel panics to disk
  • DisableWatchDog: YES
    • Disables the UEFI watchdog, can help with early boot issues
  • Target: 67
    • Shows more debug information, requires debug version of OpenCore
  • DisplayLevel: 2147483650
    • Shows even more debug information, requires debug version of OpenCore

These values are based of those calculated in OpenCore debugging

Security: Security is pretty self-explanatory, do not skip

We'll be changing AllowNvramReset, AllowSetDefault, Vault and ScanPolicy

  • AllowNvramReset: YES
    • Allows for NVRAM reset both in the boot picker and when pressing Cmd+Opt+P+R
  • AllowSetDefault: YES
    • Allow CTRL+Enter and CTRL+Index to set default boot device in the picker
  • AuthRestart: NO
    • Enables Authenticated restart for FileVault 2 so password is not required on reboot. Can be considered a security risk so optional
  • BlacklistAppleUpdate: True
    • Ignores Apple's firmware updater, recommended to enable as to avoid issues with installs and updates
  • BootProtect: None
    • Allows the use of Bootstrap.efi inside EFI/OC/Bootstrap instead of BOOTx64.efi, useful for those wanting to either boot with rEFInd or avoid BOOTx64.efi overwrites from Windows. Proper use of this quirks is not be covered in this guide
  • ExposeSensitiveData: 6
    • Shows more debug information, requires debug version of OpenCore
  • Vault: Optional
    • We won't be dealing vaulting so we can ignore, you won't boot with this set to Secure
    • This is a word, it is not optional to omit this setting. You will regret it if you don't set it to Optional, note that it is case-sensitive
  • ScanPolicy: 0
    • 0 allows you to see all drives available, please refer to Security section for further details. Will not boot USB devices with this set to default

Tools Used for running OC debugging tools like the shell, ProperTree's snapshot function will add these for you. For us, we won't be using any tools

  • Name
    • Name shown in OpenCore
  • Enabled
    • Self-explanatory, enables or disables
  • Path

Entries: Used for specifying irregular boot paths that can't be found naturally with OpenCore

Won't be covered here, see 8.6 of Configuration.pdf for more info




4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14 (Booter Path, mainly used for UI Scaling)

  • UIScale:

    • 01: Standard resolution(Clover equivalent is 0x28)
    • 02: HiDPI (generally required for FileVault to function correctly on smaller displays, Clover equivalent is 0x2A)
  • DefaultBackgroundColor: Background color used by boot.efi

    • 00000000: Syrah Black
    • BFBFBF00: Light Gray

7C436110-AB2A-4BBB-A880-FE41995C9F82 (System Integrity Protection bitmask)

  • General Purpose boot-args:
boot-args Description
-v This enables verbose mode, which shows all the behind-the-scenes text that scrolls by as you're booting instead of the Apple logo and progress bar. It's invaluable to any Hackintosher, as it gives you an inside look at the boot process, and can help you identify issues, problem kexts, etc.
debug=0x100 This disables macOS's watchdog which helps prevents a reboot on a kernel panic. That way you can hopefully glean some useful info and follow the breadcrumbs to get past the issues.
keepsyms=1 This is a companion setting to debug=0x100 that tells the OS to also print the symbols on a kernel panic. That can give some more helpful insight as to what's causing the panic itself.
npci=0x2000 This disables some PCI debugging related to kIOPCIConfiguratorPFM64, alternative is npci= 0x3000 which disables debugging related to gIOPCITunnelledKey in addition. Required for when getting stuck on PCI Start Configuration as there are IRQ conflicts relating to your PCI lanes. Not needed if Above4GDecoding is enabled. Source
  • GPU-Specific boot-args:
boot-args Description
agdpmod=pikera Used for disabling boardID on Navi GPUs(RX 5000 series), without this you'll get a black screen. Don't use if you don't have Navi(ie. Polaris and Vega cards shouldn't use this)
nvda_drv_vrl=1 Used for enabling Nvidia's Web Drivers on Maxwell and Pascal cards in Sierra and HighSierra
  • csr-active-config: Settings for SIP, generally recommended to manually change this within Recovery partition with csrutil via the recovery partition

csr-active-config is set to 00000000 which enables System Integrity Protection. You can choose a number of other options to enable/disable sections of SIP. Some common ones are as follows:

  • 00000000 - SIP completely enabled
  • 03000000 - Allow unsigned kexts and writing to protected fs locations
  • E7030000 - SIP completely disabled

Recommended to leave enabled for best security practices

  • prev-lang:kbd: <>
    • Needed for non-latin keyboards in the format of lang-COUNTRY:keyboard, recommended to keep blank though you can specify it(Default in Sample config is Russian):
    • American: en-US:0(656e2d55533a30 in HEX)
    • Full list can be found in AppleKeyboardLayouts.txt
    • Hint: prev-lang:kbd can be changed into a String so you can input en-US:0 directly instead of converting to HEX
Key Type Value
prev-lang:kbd String en-US:0

Delete: Forcibly rewrites NVRAM variables, do note that Add will not overwrite values already present in NVRAM so values like boot-args should be left alone.

LegacyEnable: NO

  • Allows for NVRAM to be stored on nvram.plist, needed for systems without native NVRAM

LegacyOverwrite: NO

  • Permits overwriting firmware variables from nvram.plist, only needed for systems without native NVRAM


  • Used for assigning NVRAM variables, used with LegacyEnable set to YES

WriteFlash: YES

  • Enables writing to flash memory for all added variables.



For setting up the SMBIOS info, we'll use CorpNewt's GenSMBIOS application.

For this example, we'll choose the iMacPro1,1 SMBIOS but some SMBIOS play with certain GPUs better than others:

  • iMacPro1,1: AMD RX Polaris and Vega
  • MacPro7,1: AMD RX Polaris, Vega and Navi(Note that MacPro7,1 is also a Catalina exclusive)
  • MacPro6,1: AMD R5/R7/R9 and older
  • iMac14,2: Nvidia Kepler and newer

Run GenSMBIOS, pick option 1 for downloading MacSerial and Option 3 for selecting out SMBIOS. This will give us an output similar to the following:

 #              iMacPro1,1 SMBIOS Info                 #

Type:         iMacPro1,1
Serial:       C02YX0TZHX87
Board Serial: C029269024NJG36CB
SmUUID:       DEA17B2D-2F9F-4955-B266-A74C47678AD3

The order is Product | Serial | Board Serial (MLB)

The Type part gets copied to Generic -> SystemProductName.

The Serial part gets copied to Generic -> SystemSerialNumber.

The Board Serial part gets copied to Generic -> MLB.

The SmUUID part gets copied to Generic -> SystemUUID.

We set Generic -> ROM to either an Apple ROM (dumped from a real Mac), your NIC MAC address, or any random MAC address (could be just 6 random bytes, for this guide we'll use 11223300 0000. After install follow the Fixing iServices page on how to find your real MAC Address)

Reminder that you want either an invalid serial or valid serial numbers but those not in use, you want to get a message back like: "Invalid Serial" or "Purchase Date not Validated"

Apple Check Coverage page

Automatic: YES

  • Generates PlatformInfo based on Generic section instead of DataHub, NVRAM, and SMBIOS sections


  • SpoofVendor: YES
    • Swaps vendor field for Acidanthera, generally not safe to use Apple as a vendor in most case
  • AdviseWindows: NO
    • Used for when the EFI partition isn't first on the Windows drive, generally found on systems that upgraded from Legacy to UEFI installs

UpdateDataHub: YES

  • Update Data Hub fields


  • Update NVRAM fields


  • Updates SMBIOS fields

UpdateSMBIOSMode: Create

  • Replace the tables with newly allocated EfiReservedMemoryType, use Custom on Dell laptops requiring CustomSMBIOSGuid quirk



ConnectDrivers: YES

  • Forces .efi drivers, change to NO will automatically connect added UEFI drivers. This can make booting slightly faster, but not all drivers connect themselves. E.g. certain file system drivers may not load.

Drivers: Add your .efi drivers here

Only drivers present here should be:

  • HfsPlus.efi
  • OpenRuntime.efi

APFS: Settings related to the APFS driver

  • EnableJumpstart: YES

    • Allows us to load Apple's APFS driver
  • HideVerbose: YES

    • Hides APFS debugging info, generally not needed
  • JumpstartHotPlug: NO

    • Allows APFS hot-plug at the OpenCore boot menu, for us we'll ignore
  • MinDate: 0

    • Minimum date allowed for Apple's APFS to load, current default is set to 2020/01/01
    • Setting to -1 will allow any version of APFS to load, note this is highly discouraged for security reasons
  • MinVersion: 0

    • Minimum macOS version that OpenCore will load the APFS driver, current default is set to 10.13.6
    • Setting to -1 will allow any version of APFS to load, note this is highly discouraged for security reasons

Audio: Related to AudioDxe settings, for us we'll be ignoring(leave as default). This is unrelated to audio support in macOS

Input: Related to boot.efi keyboard passthrough used for FileVault and Hotkey support

  • KeyFiltering: NO
    • Verifies and discards uninitialized data, mainly prevalent on 7 series Gigabyte boards
  • KeyForgetThreshold: 5
    • The delay between each key input when holding a key down, for best results use 5 milliseconds
  • KeyMergeThreshold: 2
    • The length of time that a key will be registered before resetting, for best results use 2 milliseconds
  • KeySupport: YES
    • Enables OpenCore's built in key support and required for boot picker selection, do not use with OpenUsbKbDxe.efi
  • KeySupportMode: Auto
    • Keyboard translation for OpenCore
  • KeySwap: NO
    • Swaps Option and Cmd key
  • PointerSupport: NO
    • Used for fixing broken pointer support, commonly used for Z87 Asus boards
  • PointerSupportMode:
    • Specifies OEM protocol, currently only supports Z87 and Z97 ASUS boards so leave blank
  • TimerResolution: 50000
    • Set architecture timer resolution, Asus Z87 boards use 60000 for the interface. Settings to 0 can also work for some

Output: Relating to visual output

  • TextRenderer: BuiltinGraphics
    • Used for fixing resolution of OpenCore itself, Resolution must be set to Max to work correctly
  • ConsoleMode: [Blank]
    • Specifies Console output size, best to keep it blank
  • Resolution: Max
    • Sets OpenCore's resolution, Max will use the highest available resolution or can be specified (WxH@Bpp (e.g. 1920x1080@32) or WxH (e.g. 1920x1080))
  • ClearScreenOnModeSwitch: NO
    • Needed for when half of the previously drawn image remains, will force black screen before switching to TextMode. Do note that this is only required in cases when using System TextRenderer
  • IgnoreTextInGraphics: NO
    • Fix for UI corruption when both text and graphics outputs, only relevant for users using System TextRenderer
  • ProvideConsoleGop: YES
    • Enables GOP(Graphics output Protocol) which the macOS bootloader requires for console handle, required for graphical output once the kernel takes over
  • DirectGopRendering: NO
    • Use builtin graphics output protocol renderer for console, mainly relevant for MacPro5,1 users
  • ReconnectOnResChange: NO
  • ReplaceTabWithSpace: NO
    • Depending on the firmware, some system may need this to properly edit files in the UEFI shell when unable to handle Tabs. This swaps it for spaces instead-but majority can ignore it but do note that ConsoleControl set to True may be needed
  • SanitiseClearScreen: NO
    • Fixes High resolutions displays that display OpenCore in 1024x768, only relevant for users using System TextRenderer

ProtocolOverrides: Most values can be ignored here as they're meant for real Macs/VMs


  • DeduplicateBootOrder: YES
    • Request fallback of some Boot prefixed variables from OC_VENDOR_VARIABLE_GUID to EFI_GLOBAL_VARIABLE_GUID. Used for fixing boot options.
  • ExitBootServicesDelay: 0
    • Only required for very specific use cases like setting to 3000 - 5000 for ASUS Z87-Pro running FileVault 2
  • IgnoreInvalidFlexRatio: NO
    • Fix for when MSR_FLEX_RATIO (0x194) can't be disabled in the BIOS, required for all pre-Skylake based systems
  • ReleaseUsbOwnership: NO
    • Releases USB controller from firmware driver, needed for when your firmware doesn't support EHCI/XHCI Handoff. Clover equivalent is FixOwnership
  • RequestBootVarRouting: YES
    • Redirects AptioMemoryFix from EFI_GLOBAL_VARIABLE_GUID to OC\_VENDOR\_VARIABLE\_GUID. Needed for when firmware tries to delete boot entries and is recommended to be enabled on all systems for correct update installation, Startup Disk control panel functioning, etc.
  • TscSyncTimeout: 0
    • Attempts to fix the TSC on badly behaving platforms, mainly relevant for those running debug kernels as this quirks cannot fix S3 wakes. Instead VoodooTsc is the preferred option.
  • UnblockFsConnect: NO
    • Some firmware block partition handles by opening them in By Driver mode, which results in File System protocols being unable to install. Mainly relevant for HP systems when no drives are listed


Used for exempting certain memory regions from OSes to use, mainly relevant for Sandy Bridge iGPUs or systems with faulty memory. Use of this quirk is not covered in this guide

Cleaning up

And now you're ready to save and place it into your EFI under EFI/OC.

For those having booting issues, please make sure to read the Troubleshooting section first and if your questions are still unanswered we have plenty of resources at your disposal:

Sanity check:

So thanks to the efforts of Ramus, we also have an amazing tool to help verify your config for those who may have missed something:

AMD BIOS Settings


  • Fast Boot
  • Compatibility Support Module (CSM)(Must be off, GPU errors like gIO are common when this option in enabled)


  • Above 4G decoding(This must be on, if you can't find the option then add npci=0x2000 to boot-args. Do not have both this option and npci enabled at the same time)
  • EHCI/XHCI Hand-off
  • OS type: Windows 8.1/10 UEFI Mode


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