How to Spoof AMD Radeon WX 2100 and Fix Black Screen on macOS Sequoia

How to Configure AMD Polaris 12 Graphics for macOS Sequoia

Setting up macOS Sequoia on a Dell Optiplex 7050 (Intel Core i5-6500) paired with an AMD Radeon WX 2100 dGPU can result in a black screen. This behaviour occurs because the WX 2100 uses a Lexa core, which is not natively supported by macOS and must be spoofed to mimic a compatible Baffin-core card.

1. Prerequisites

• Hardware Specs: Dell Optiplex 7050, Intel i5-6500 CPU, AMD Radeon WX 2100 (Lexa Core), DisplayPort to HDMI adapter.
• Required Kexts: Lilu, WhateverGreen.

2. Compatibility Snapshot

• Graphics Acceleration: Fully supported post-spoof. Native Skylake graphics (HD 530) are unsupported in Sequoia, making the dGPU configuration mandatory.
• Display Adapters: Passive DP-to-HDMI adapters often fail on macOS. An active adapter or native DP cable is recommended.

3. Installation Preparation

1. BIOS Configurations: Enable Multi-Monitor (to keep the iGPU active in headless mode if needed) and set primary display to PCIe.

4. EFI and config.plist Review

1. Spoof Device ID: Open config.plist using ProperTree. Navigate to DeviceProperties -> Add -> PciRoot(0x0)/Pci(0x1,0x0)/Pci(0x0,0x0) (verify the PCI path of your dGPU using Hackintool). Inject the following:
   • device-id: E0670000 (Spoofs the Radeon RX 560 Baffin device ID)
   • revision-id: CF000000
2. Boot Arguments: Under NVRAM boot-args, add agdpmod=pikera to fix adapter routing issues.

5. Post-Installation

1. Verify acceleration: Check that System Information reports the card as "Radeon RX 560" or "Radeon WX 2100" with full graphics acceleration.

6. Troubleshooting

Reported Issue: Black screen on dGPU boot

1. Adapter timing mismatch: If the screen remains black, replace the DP-to-HDMI adapter with a native DisplayPort cable.
2. Inject EDID: If the monitor reports "No Signal", you may need to force EDID injection in the config.plist.

7. Dual Boot and Advanced Configuration

• This spoof only affects macOS. Under Windows, the card will boot normally with native AMD WX 2100 enterprise drivers.

8. Verification, Maintenance and Rollback

• Rollback: Remove the device-id spoof entry if you upgrade the GPU to a natively supported card like the RX 6600.

9. References and Glossary

• Lexa Core: The code name for AMD\'s entry-level Polaris GPUs.