# OpenCore beauty treatment

Main thing this guide will go over:

# Setting up OpenCore's GUI

So to get started, we're gonna need 0.5.7 or newer as these builds have the GUI included with the rest of the files. If you're on an older version, I recommend updating: Updating OpenCore

Once that's done, we'll need a couple things:

Once you have both of these, we'll next want to add it to our EFI partition:

Now in our config.plist, we have 4 things we need to fix:

  • Misc -> Boot -> PickerMode: External
  • Misc -> Boot -> PickerAttributes: 17
    • This enables mouse/trackpad support as well as .VolumeIcon.icns reading from the drive, allows for macOS installer icons to appear in the picker
  • Misc -> Boot -> PickerVariant: Acidanthera\GoldenGate
    • Applicable variables:
      • Auto — Automatically select one set of icons based on DefaultBackground colour.
      • Acidanthera\Syrah — Normal icon set.
      • Acidanthera\GoldenGate — Nouveau icon set.
      • Acidanthera\Chardonnay — Vintage icon set.
  • UEFI -> Drivers and add OpenCanopy.efi

Once all this is saved, you can reboot and be greeted with a true Mac-like GUI:

Default (Syrah) Modern (GoldenGate) Old (Chardonnay)

# Setting up Boot-chime with AudioDxe

So to start, we'll need a couple of things:

  • Onboard audio output
    • USB DACs will not work
    • GPU audio out is a hit or miss
  • AudioDxe (opens new window) in both EFI/OC/Drivers and UEFI -> Drivers
  • Binary Resources (opens new window)
    • Add the Resources folder to EFI/OC, just like we did with the OpenCore GUI section
    • For those running out of space, OCEFIAudio_VoiceOver_Boot.mp3 is all that's required for the Boot-Chime
  • Debug version of OpenCore with logging enabled

Setting up NVRAM:

  • NVRAM -> Add -> 7C436110-AB2A-4BBB-A880-FE41995C9F82:
    • SystemAudioVolume | Data | 0x46
    • This is the boot-chime and screen reader volume, note it's in hexadecimal so would become 70 in decimal; 0x80 is mute
Optional NVRAM entries
  • NVRAM -> Add -> 7C436110-AB2A-4BBB-A880-FE41995C9F82:
    • StartupMute | Data | 0x00
    • Mute startup chime sound in firmware audio support; 0x00 is unmuted, missing variable or any other value means muted

Setting up UEFI -> Audio:

  • AudioCodec: (Number)

    • Codec address of Audio controller. This typically contains the first audio codec address on the builtin analog audio controller (HDEF). Failsafe value is 0.
    • To find yours:
      • Check IORegistryExplorer (opens new window) -> HDEF -> AppleHDAController -> IOHDACodecDevice and see the IOHDACodecAddress property (ex: 0x0)

      • Can also check via terminal (Note if multiple show up, use the vendor ID to find the right device):

        ioreg -rxn IOHDACodecDevice | grep VendorID   # List all possible devices
        sh ioreg -rxn IOHDACodecDevice | grep IOHDACodecAddress # Grab the codec address
  • AudioDevice: (String)

    • Device path (PciRoot) of audio controller
    • Run gfxutil (opens new window) to find the path:
      • /path/to/gfxutil -f HDEF
      • ex: PciRoot(0x0)/Pci(0x1f,0x3)
  • AudioOutMask: (Number)

    • Play sound in UEFI to more than one channel (e.g. main speaker plus bass speaker). Failsafe value is -1 (output to all).

    • Output channels are internally numbered as bit 0 (value 1), bit 1 (value 2) and so on. A value of 1 refers to the first audio output (not necessarily main speaker). A value of -1 is used to play to all channels simultaneously.

    • When AudioSupport is enabled, AudioDevice must be either empty or a valid path and AudioOutMask must be non-zero

    • Easiest way to find the right one is to go through each one (from 2^0 to 2^(N - 1), where N is the number of outputs listed in your log); ex: 5 outputs would translate to 1/2/4/8/16 (or a combination of these) as possible values

    • You can find all the ones for your codec in the OpenCore debug logs:

      06:065 00:004 OCAU: Matching PciRoot(0x0)/Pci(0x1F,0x3)/VenMsg(A9003FEB-D806-41DB-A491-5405FEEF46C3,00000000)...
      06:070 00:005 OCAU: 1/2 PciRoot(0x0)/Pci(0x1F,0x3)/VenMsg(A9003FEB-D806-41DB-A491-5405FEEF46C3,00000000) (5 outputs) - Success
  • AudioSupport: (Boolean)

    • Set this to True
    • Enabling this setting routes audio playback from builtin protocols to specified dedicated audio ports (AudioOutMask) of the specified codec (AudioCodec), located on the specified audio controller (AudioDevice)
  • DisconnectHDA: (Boolean)

    • Set this to False
  • MaximumGain: (Number)

    • Maximum gain to use for UEFI audio, specified in decibels (dB) with respect to amplifier reference level of 0 dB
    • Set this to -15
  • MinimumAssistGain: (Number)

    • Minimum gain in decibels (dB) to use for picker audio assist. The screen reader will use this amplifier gain if the system amplifier gain read from the SystemAudioVolumeDB NVRAM variable is lower than this
    • Set this to -30
  • MinimumAudibleGain: (Number)

    • Minimum gain in decibels (dB) at which to attempt to play any sound
    • Set this to -55
  • PlayChime: (String)

    • Set this to Enabled
    • Supported values are:
      • Auto — Enables chime when StartupMute NVRAM variable is not present or set to 00
      • Enabled — Enables chime unconditionally
      • Disabled — Disables chime unconditionally
  • ResetTrafficClass: (Boolean)

    • Set this to False
  • SetupDelay: (Number)

    • By default, leave this at 0
    • Some codecs many need extra time for setup, we recommend setting to 500 milliseconds (0.5 seconds) if you have issues

Once done, you should get something like this:


There are codecs like Realtek ALC295 (HP and others) whose default audio sampling rate is 48 kHz. In this case, even if 44.1 kHz is supported by the codec, sound output fails. The only way at the moment to fix this is to change the sample rate of the OCEFIAudio_VoiceOver_Boot.mp3 file with an audio editor to raise it from 44.1 kHz to 48 kHz. This has to be done manually as OpenCore does not have an automated mechanism for it.


Note for visually impaired:

  • OpenCore hasn't forgotten about you! With the AudioDxe setup, you can enable both picker audio and FileVault VoiceOver with these 2 settings:
    • Misc -> Boot -> PickerAudioAssist -> True to enable picker audio
    • UEFI -> ProtocolOverrides -> AppleAudio -> True to enable FileVault voice over
  • See Security and FileVault on how to setup the rest for proper FileVault support.