OpenCore: How to Enable Boot Chime (AudioDxe) Setup Guide

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Enabling the Apple Boot Chime in OpenCore

Adding the iconic Apple boot chime to your Hackintosh provides an authentic Mac experience. OpenCore supports this via the AudioDxe.efi driver, but configuring it requires precise coordination between your UEFI drivers, NVRAM variables, and AppleALC layout IDs. If your chime isn't working, follow this checklist.

Step 1: Check Required Files

  • Ensure AudioDxe.efi is present in your EFI/OC/Drivers folder.
  • Ensure AudioDxe.efi is enabled in your config.plist under UEFI > Drivers.
  • Ensure you have the required audio resources. You must have the Resources folder populated with the official Apple audio files (downloaded via the OcBinaryData repository) placed in EFI/OC/Resources/Audio.

Step 2: Configure UEFI > Audio

Open your config.plist and navigate to the UEFI > Audio section. Set the following keys:

AudioSupport: True

AudioDevice: This must be the absolute PciRoot path of your audio controller (e.g., PciRoot(0x0)/Pci(0x1F,0x3)). You can find this using Hackintool.

AudioOutMask: Set to -1 (plays audio on all outputs) or specify a specific port (e.g., 1).

PlayChime: Enabled

Step 3: NVRAM & NVRAM Reset

The boot chime volume is controlled by macOS NVRAM variables. If you recently set up the files but haven't reset NVRAM, the bootloader won't know how loud to play the chime.

  1. In your config.plist under NVRAM > Add > 7C436110-AB2A-4BBB-A880-FE41995C9F82, ensure SystemAudioVolume is set to a reasonable value (e.g., 46 in hex).
  2. Crucial Step: Reboot your computer, go to the OpenCore picker, press Space to reveal hidden options, and select Reset NVRAM.
  3. Boot into macOS. Adjust the volume using your keyboard volume keys. Reboot again. The chime should now play based on the volume you set before shutting down.

Troubleshooting: If it still doesn't play, ensure your alcid=X boot argument is correct for your motherboard's audio codec, as AudioDxe relies on the same hardware pathways.

Original Question: "Need help with setting up boot chime"

Need help with setting up boot chime

When trying to set up the gui and the boot chime, out of them 2 the boot chime doesn't seem to work. I've checked everything in my config plist as well as in my efi and the driver is in the config plist as well as in my efi folder.

Any help would be appreciated since I haven't tried anything yet.

I'm sending both the config plist as well as the debug version of my log below

submitted by /u/lubieyyyyyy
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