Title Mac Studio M1 Ultra – GPU not recognized, Denoise not available (works on MacBook)

Question

I have a reproducible issue where Lightroom Classic (15.3) does not recognize the GPU on my Mac Studio (M1 Ultra). macOS 26.4.1 GPU shows 0.0 MB / not supported “Use GPU” is greyed out Denoise returns: “Requested adjustment is not applicable” Important: The exact same setup works on a MacBook (same macOS, same LR version, same files). GPU is recognized and Denoise works there. Already tried: Reset preferences Clean reinstall Cleared Camera Raw cache Tested with single display System reports GPU + Metal correctly (system_profiler). → Seems Lightroom fails to detect GPU on this Mac Studio only. Anyone seeing the same on Mac Studio?

Sameer K · Accepted Answer

Hey, @mauricep49265357. Welcome to the Lightroom Classic Community. I'll help you figure this out. Please share the system info from Lightroom Classic > Help > System info > Copy & paste into a text document > upload & attach here.

Try these steps to clear the GPU Logs:

On Mac, the location is: ~/Library/Application Support/Adobe/CameraRaw
Hold down the Option key in the Finder when using the Go menu. The library will appear below the current user's home directory.
In this folder, delete the ‘GPU’ & ‘Logs’ folders.
Launch Lightroom Classic.

Thanks!
Sameer K

(Type '@' and type my name to mention me when you reply)

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