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Emulated NVRAM

Work In Progress

So this section is for those who don't have native NVRAM, the most common hardware to have incompatible native NVRAM with macOS are the non-Z370 300 series chipsets:

  • B360
  • B365
  • H310
  • H370
  • Q370
  • Z390

Making nvram.plist

So to make a nvram.plist you'll need 3 things set:

Within your config.plist:

  • DisableVariableWrite: set to YES
  • LegacyEnable: set to YES
  • LegacySchema: NVRAM variables set(OpenCore compares these to the variables present in nvram.plist)
  • ExposeSensitiveData: set to 0x3

And within your EFI:

  • FwRuntimeServices.efi driver(this is needed for proper sleep, shutdown and other services to work correctly

Now grab the 'LogoutHook.command' and place it somewhere safe like within your user directory:

/Users/(your username)/LogoutHook/LogoutHook.command

Open up terminal and run the following:

sudo defaults write com.apple.loginwindow LogoutHook /Users/(your username)/LogoutHook/LogoutHook.command

And voila! You have emulated NVRAM, do keep in mind this requires macOS to support the -x flag for this to work correctly which is unavailable on 10.12 and below. nvram.mojave fixes this by invoking it instead of the system one