- Joined
- Jul 15, 2017
- Messages
- 170
- Motherboard
- Gigabyte GA-Z270XP-SLI
- CPU
- i7-7700K
- Graphics
- RX 6600 XT
- Mac
- Mobile Phone
I just received my Radeon RX 6600 XT.Alternative method to Henbury patch to avoid black screen with MacPro or iMacPro SMBIOS on Ventura (2)
There are some more advanced SSDT configurations such as SSDT-VEGA.aml which, in addition to creating devices, does so by mimicking the way real Macs are configured (EGP0 and EGP1 devices instead of BRG0).
SSDT-VEGA has the same benefits as SSDT-BRG0: Henbury patch not needed and good GeekBench 5 scores.
It also requires checking the PCI path to your graphics card. In the example code I keep the same path as in the previous SSDT-BRG0.
C-like:DefinitionBlock ("", "SSDT", 2, "HACK", "VEGA", 0x00000000) { External (_SB_.PCI0, DeviceObj) External (_SB_.PCI0.PEG0, DeviceObj) External (_SB_.PCI0.PEG0.PEGP, DeviceObj) Scope (\_SB) { Scope (PCI0) { Scope (PEG0) { Scope (PEGP) { Method (_STA, 0, NotSerialized) // _STA: Status { If (_OSI ("Darwin")) { Return (Zero) } Else { Return (0x0F) } } } Device (EGP0) { Name (_ADR, Zero) // _ADR: Address Method (_STA, 0, NotSerialized) // _STA: Status { If (_OSI ("Darwin")) { Return (0x0F) } Else { Return (Zero) } } Device (EGP1) { Name (_ADR, Zero) // _ADR: Address Device (GFX0) { Name (_ADR, Zero) // _ADR: Address } Device (HDAU) { Name (_ADR, One) // _ADR: Address } } } } } } }
I'm running Catalina OpenCore 0.8.5 with an Asus Radeon RX 570 and hope to upgrade my iMac18,3 to Ventura today.
Excuse my ignorance (it's been a While since I've dealt with compiling on a Mac) but .. is this the .aml or must this file (what what suffix) be compiled possibly with MaciASL into a .aml?
And then Where does the resulting file go?
And after I install that card there's the possibility that I won't be able to boot?
I'll use a thumb drive for the modified EFI but .. are there some steps I could take Before installing the card so that I would have a fallback to be able to boot with it installed in some fashion and Then fix any issues?
Thanks for your detailed explanation of your progress! It really influenced me to Buy that card!!