Please try the attached sample using OpenCore 0.9.5.
Please refer to the basic
guide for HP6300/8300 here.The attached ssdt-PM is also attached to the guide.
1.
Set NVRAM->Add->7C436110-AB2A-4BBB-A880-FE41995C9F82->prev-lang:kbd to your preferred language
2.
Write the following information using GenSMBIOS.
PlatformInfo->Generic->SystemProductName = Type: (iMacPro1,1)
PlatformInfo->Generic->MLB = Board Serial:
PlatformInfo->Generic->ROM = Apple ROM:
PlatformInfo->Generic->SystemSerialNumber = Serial:
PlatformInfo->Generic->SystemUUID = SmUUID:
3.
If the installation is successful, make the following corrections and store it in the HDD/SSD EFI.
NVRAM->Add->7C436110-AB2A-4BBB-A880-FE41995C9F82->boot-args = "amfi=0x80"
NVRAM->Add->7C436110-AB2A-4BBB-A880-FE41995C9F82->csr-active-config = <03080000>
4.
After restarting from the HDD/SSD, apply NVRAM RESET and apply OCLP after startup.
In this state, CPU-PM is not valid and requires modification for use with SMBIOS = iMac13,2.
See
here for a guide after using OCLP.