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OpenCore Configuration

Generic Properties

  1. SpoofVendor
    • Type: plist boolean
    • Failsafe: false
    • Description: Sets SMBIOS vendor fields to Acidanthera.

    It can be dangerous to use “Apple” in SMBIOS vendor fields for reasons outlined in the SystemManufacturer description. However, certain firmware may not provide valid values otherwise, which could obstruct the operation of some software.

  2. AdviseFeatures
    • Type: plist boolean
    • Failsafe: false
    • Description: Updates FirmwareFeatures with supported bits.

    Added bits to FirmwareFeatures:

    • FW_FEATURE_SUPPORTS_CSM_LEGACY_MODE (0x1) - Without this bit, it is not possible to reboot to Windows installed on a drive with an EFI partition that is not the first partition on the disk.
    • FW_FEATURE_SUPPORTS_UEFI_WINDOWS_BOOT (0x20000000) - Without this bit, it is not possible to reboot to Windows installed on a drive with an EFI partition that is the first partition on the disk.
    • FW_FEATURE_SUPPORTS_APFS (0x00080000) - Without this bit, it is not possible to install macOS on an APFS disk.
    • FW_FEATURE_SUPPORTS_LARGE_BASESYSTEM (0x800000000) - Without this bit, it is not possible to install macOS versions with large BaseSystem images, such as macOS 12.

    Note: On most newer firmwares these bits are already set, the option may be necessary when “upgrading” the firmware with new features.

  3. MaxBIOSVersion
    • Type: plist boolean
    • Failsafe: false
    • Description: Sets BIOSVersion to 9999.999.999.999.999, recommended for legacy Macs when using Automatic PlatformInfo, to avoid BIOS updates in unofficially supported macOS versions.
  4. SystemMemoryStatus
    • Type: plist string
    • Failsafe: Auto
    • Description: Indicates whether system memory is upgradable in PlatformFeature. This controls the visibility of the Memory tab in “About This Mac”.

    Valid values:

    • Auto — use the original PlatformFeature value.
    • Upgradable — explicitly unset PT_FEATURE_HAS_SOLDERED_SYSTEM_MEMORY (0x2) in PlatformFeature.
    • Soldered — explicitly set PT_FEATURE_HAS_SOLDERED_SYSTEM_MEMORY (0x2) in PlatformFeature.

    Note: On certain Mac models, such as the MacBookPro10,x and any MacBookAir, SPMemoryReporter.spreporter will ignore PT_FEATURE_HAS_SOLDERED_SYSTEM_MEMORY and assume that system memory is non-upgradable.

  5. ProcessorType
    • Type: plist integer
    • Failsafe: 0 (Automatic)
    • Description: Refer to SMBIOS ProcessorType.
  6. SystemProductName
    • Type: plist string
    • Failsafe: Empty (OEM specified or not installed)
    • Description: Refer to SMBIOS SystemProductName.
  7. SystemSerialNumber
    • Type: plist string
    • Failsafe: Empty (OEM specified or not installed)
    • Description: Refer to SMBIOS SystemSerialNumber.

    Specify special string value OEM to extract current value from NVRAM (SSN variable) or SMBIOS and use it throughout the sections. This feature can only be used on Mac-compatible firmware.

  8. SystemUUID
    • Type: plist string, GUID
    • Failsafe: Empty (OEM specified or not installed)
    • Description: Refer to SMBIOS SystemUUID.

    Specify special string value OEM to extract current value from NVRAM (system-id variable) or SMBIOS and use it throughout the sections. Since not every firmware implementation has valid (and unique) values, this feature is not applicable to some setups, and may provide unexpected results. It is highly recommended to specify the UUID explicitly. Refer to UseRawUuidEncoding to determine how SMBIOS value is parsed.

  9. MLB
    • Type: plist string
    • Failsafe: Empty (OEM specified or not installed)
    • Description: Refer to SMBIOS BoardSerialNumber.

    Specify special string value OEM to extract current value from NVRAM (MLB variable) or SMBIOS and use it throughout the sections. This feature can only be used on Mac-compatible firmware.

  10. ROM
    • Type: plist multidata, 6 bytes
    • Failsafe: Empty (OEM specified or not installed)
    • Description: Refer to 4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14:ROM.

    Specify special string value OEM to extract current value from NVRAM (ROM variable) and use it throughout the sections. This feature can only be used on Mac-compatible firmware.