Answered
Lightroom 12.4 - 2019 MacBook Pro - VEGA 4GB, GPU acceleration minimal, GPU for export disabled
macOS 12.6.7
clean install 12.4 LR - cannot utilize full GPU acceleration as it's greayed out.
Fix?
Photoshop handles it fine as in 2nd image.


macOS 12.6.7
clean install 12.4 LR - cannot utilize full GPU acceleration as it's greayed out.
Fix?
Photoshop handles it fine as in 2nd image.


Try deleting the file "Camera Raw GPU Config.txt" as detailed here:
https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html#solution-3
That will cause LR to reevaluate the capabilities of your GPU.
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