Tested with both AMD Radeon RX Vega 64 8 GB and AMD Radeon RX Vega 56 8 GB with no HWAccel. I have gathered this information from the following links:
-
https://github.com/dortania/OpenCore-Legacy-Patcher/commit/5df3cca616881272acdee75c4eab8b5dc2f1f2c6
-
https://github.com/dortania/OpenCore-Legacy-Patcher/issues/1008
-
https://github.com/dortania/OpenCor...16881272acdee75c4eab8b5dc2f1f2c6/CHANGELOG.md
-
https://dortania.github.io/OpenCore-Legacy-Patcher/SONOMA-DROP.html#issues
-
https://github.com/kholia/OSX-KVM/pull/207
**Expert**: Computer Systems Engineer specializing in macOS and OpenCore
**Objective**: To provide a detailed guide on enabling graphic acceleration on a Mac Pro 5,1 with an AMD Radeon RX Vega 64 8 GB graphics card using OpenCore.
**Assumptions**: You have a Mac Pro 5,1 running OpenCore and you're facing issues with graphic acceleration.
The OpenCore Legacy Patcher documentation does mention issues related to graphics support but doesn't provide a direct solution for your specific hardware configuration. However, it does indicate that the build includes both Legacy Metal and non-Metal patches for macOS Sonoma. This suggests that there might be patches available that could potentially solve your issue.
Here are the steps to potentially enable graphic acceleration:
1. **Check OpenCore Version**: Make sure you are running the latest version of OpenCore Legacy Patcher. Updates often include bug fixes and new features.
2. **Review Patches**: Go through the list of available patches in OpenCore Legacy Patcher, specifically focusing on Legacy Metal and non-Metal patches. Apply the ones that are relevant to your hardware.
3. **Edit Config.plist**: Open your `config.plist` file located in your EFI partition under `EFI/OC/`. Look for the section related to graphics and make sure it's configured to enable acceleration.
4. **Kernel Extensions**: Make sure you have the necessary kexts (Kernel Extensions) for your AMD Radeon RX Vega 64. These can usually be found in the `Kexts` folder in your EFI partition.
5. **Debugging**: Use OpenCore's debugging tools to check for any errors or warnings related to graphics acceleration.
6. **Reboot and Test**: After making these changes, reboot your system and test to see if graphics acceleration is working.
The commit titled "Avoid GVA downgrade on Skylake hosts" in the OpenCore Legacy Patcher repository contains several changes that could be relevant to your situation. The commit shows modifications in multiple files, including CHANGELOG.md, constants.py, defaults.py, and sys_patch_generate.py.
Here are the key takeaways:
- GVA Downgrade Avoidance: The commit seems to remove the AppleGVA downgrade on Intel Skylake iGPUs. This is particularly relevant if you have a Skylake processor along with your AMD card.
- AMD Vega Support: The changelog mentions resolving AMD Vega support on pre-AVX2 Macs in macOS Ventura. This could be directly related to your AMD Radeon RX Vega 64 8 GB card.
- Code Changes: The Python code changes suggest adjustments to the patching logic, particularly for graphics. For example, the sys_patch_generate.py file has conditions that update required patches based on the graphics hardware details.
Steps to Apply the Workaround
- Update to Latest Version: Make sure you are using the OpenCore Legacy Patcher version that includes this commit.
- Check Configurations: Open your config.plist and ensure that any settings related to GVA or AMD Vega are correctly configured.
- Apply Patches: Use OpenCore Legacy Patcher to apply the relevant patches, especially those mentioned in the commit.
- Reboot: After applying the patches and making the necessary changes, reboot your system to see if the graphic acceleration issue is resolved.