Denoise in LR not working

Forum|Forum|14 days ago
July 8, 2026
2 replies
57 views

Denoise was working fine, but now it starts and will not complete. Switches off after a few seconds. I am using Lightroom classic 14.5.2 and CR 17.5 Have an iMac OS Ventura 13.7.8 Updates all good. Have 559 GB available on hard drive. Have emptied LR caches. Have set “Use Graphics Processor” to custom and off and re tried - same result. Please advise.

maddyn16672719Author

Participating Frequently

As far as I know with a macOS, GPU drivers are built into the OS updates. I cannot update it independently from the OS!! NOTE: The OS on my iMac is up to date!

Nor sure why my GPU should suddenly stop working either, as have had the same LR Classis version for a long time now, as I cannot update it any further because of the limits of the OS.

Are you suggesting a buy a new iMac? I don’t have A$4200 just lying around!! So frustrating that Adobe expects us to be able to afford new computers as they continually update programs and make older version that worked perfectly well redundant!

JohanElzenga

Community Expert

There is a known Denoise problem with Camera Raw 18.4 and versions of Lightroom Classic that contain a lower built-in Camera Raw version. Because you cannot update Lightroom Classic, you should try downgrading Camera Raw. https://helpx.adobe.com/camera-raw/kb/camera-raw-plug-in-installer.html

-- Johan W. Elzenga

maddyn16672719Author

Participating Frequently

Thank you so much Johan. I think that could be the problem Will give it a try and report back.

Sameer K

Community Manager

Hey, @maddyn16672719. Welcome to the Lightroom Community. I'll help you figure this out.

Since the Denoise workflow is GPU-driven, updating macOS, Lightroom Classic, and Camera Raw is the best course forward.

Thanks!
Sameer K
(Type '@' and type my name to mention me when you reply)

maddyn16672719Author

Participating Frequently

Thanks Sameer,

Unless I buy a new iMac computer I cannot update my OS. It is fully updated as far as Ventura (13.7.8) is concerned, which means the GPU (Radeon Pro 580 8 GB) is also up to date. I cannot install a higher version of LR as my OS will not accept it. The only thing that has seemingly changed recently is that is CR updated to v18.4. Denoise was working fine - and as far I as I know nothing on my computer changed (except CR)

Any other suggestions would be most welcome.

Maddy.

dj_paige

Legend

First, make sure (confirm, don’t just say everything is up to date) that you have installed the most current driver for your GPU. If not, then please update the driver.

Next, your GPU is now 9 years old, and it may not be able to handle the latest demands put on it by Lightroom Classic. Or it may be your GPU is now malfunctioning.

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