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P: Lightroom Denoise suddenly stopped working

Forum|Forum|3 days ago
June 20, 2026
117 replies
1530 views

Hi everyone,

I'm having an issue with the latest version of Lightroom CC on a MacBook M5 Pro running macOS Tahoe 26.5.1. (I was experiencing the same problem on 26.5 and decided to update hoping it would fix it, but unfortunately it didn't.)

Since this morning, it's been impossible to to use Noise Reduction, even though my internet connection is working perfectly. I've already updated both Lightroom CC and macOS, cleared the cache, and optimized the catalog, but I keep getting this error screen whenever I try to use Noise Reduction.

Has anyone experienced the same issue or knows how to fix it? Any help would be greatly appreciated. Thanks! 🙏

Correct answer Sameer K

Hi All! Lightroom Classic v15.4.1 is now available for downlaod via the Creative Cloud desktop app with the following critical bug fiixes for the issue reported in this thread and the other:

Thanks!
Sameer K

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Blurrysoul

Participant

Stesso identico problema :(
secondo voi quanto ci metteranno a rilasciare una nuova versione compatibile?

A

AxelMatt

Community Expert

Thread closed because double posting.

My System: Intel i7-8700K - 64GB RAM - NVidia Geforce RTX 3060 - Windows 11 Pro 25H2 -- LR-Classic 15 - Photoshop 27 - Nik Collection 9 - PureRAW 6 - Topaz Photo AI

photophilljk

Participant

Are you using version 15.4? That’s had the update to Denoise but the version has issues and has been revoked by Adobe

EmilieSchwelmer

Participant

Denoise stopped working from one second to another. photos I try to Denoise are dng. until now it worked perfectly. photo already denoised are fine.I can easily "undenoise" them or redenoise. however all new imports as of now can not be denoised as well as all the photos already in the catalog that were not denoised prior to the "crash". I always get the same error message : an unexpected error occurred while processing. (1) . I tried everything from using Denoise in a new test catalog, moving the photos on my Mac(and not external drive), checking the available space everywhere…. to deinstalling and reinstalling Lightroom, but nothing works. please help

EmilieSchwelmer

Participant

Denoise stopped working from one second to another. photos I try to Denoise are dng. until now it worked perfectly. photo already denoised are fine.I can easily "undenoise" them or redenoise. however all new imports as of now can not be denoised as well as all the photos already in the catalog that were not denoised prior to the "crash". I always get the same error message : an unexpected error occurred while processing. (1) . I tried everything from using Denoise in a new test catalog, checked the available space, suppressed the caches, customer the GPU...and even deinstall/reinstall Lightroom, but nothing works. please help

AndrewZander

Participant

This lazy product rollout is exactly why people leave Adobe products.

It looks like there is a mismatch between Camera Raw and LrC 15.3 and earlier. Reverting to an older Camera Raw, or waiting for LrC 15.4 should resolve the issue … that should have never been an issue in the first place…

Galdypr

Participating Frequently

Well... I'm trying all of that step by step Everything advise, and the problem continues... I'm tired to try that my MacBook Pro Work properly with Lightroom, and that not for free because I pay a subscription. But in HP Envy x360 32GB the option of reduce noise Works excellent... Don't understand! 🤔 !--tgqphd||[]-->

SPBaldwin

Participant

Thanks - I ended up just deleting Camera Raw from my Adobe folder - will reinstall/update it once there is a solid solution out there.

PDX-Fotodude

Participant

Having the same issue with denoise. Removing the CameraRaw folder DID NOT resolve the issue. Today is 6/21/2026. This was working yesterday as I completed a project before heading out to an event.

Mac OS 26.5.1
Lightroom Classic version: 15.3.1 [ 202605261338-e36f8566 ]
Internal Camera Raw version: 18.3 [ 2530 ]

PDX-Fotodude

Participant

A quick check of the update panel indicates that CameraRaw 18.4 was installed today. LightRoom Classic does seen to acknowledge this:

Lightroom Classic version: 15.3.1 [ 202605261338-e36f8566 ]
License: Creative Cloud
Language setting: en-US
Operating system: Mac OS 26
Version: 26.5.1 [25F80]
Application architecture: arm64
Logical processor count: 14
Processor speed: NA
SqLite Version: 3.36.0
Adobe GSDK Version: 1.4.0.213

Power Source: Battery, 80%
Built-in memory: 49,152.0 MB
Dedicated GPU memory used by Lightroom: 1,725.0MB / 38,338.5MB (4%)
Real memory available to Lightroom: 49,152.0 MB
Real memory used by Lightroom: 1,753.3 MB (3.5%)
Virtual memory used by Lightroom: 430,729.5 MB
Memory cache size: 152.8MB
Internal Camera Raw version: 18.3 [ 2530 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2
Camera Raw virtual memory: 210MB / 24575MB (0%)
Camera Raw real memory: 283MB / 49152MB (0%)

Cache1:
Final1- RAM:196.0MB, VRAM:952.0MB, DSC_8110.NEF
NT- RAM:196.0MB, VRAM:952.0MB, Combined:1,148.0MB

Cache2:
m:152.8MB, n:188.7MB

U-main: 114.0MB

Standard Preview Size: 1440 pixels
Displays: 1) 3456x2234

Graphics Processor Info:
Metal: Apple M4 Pro
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Auto (S5_37)

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/gmasson/Pictures/Lightroom/Lightroom Catalog-2-v13-3.lrcat
Settings Folder: /Users/gmasson/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Flickr
4) HDR Efex Pro 2
5) Topaz Photo AI

Config.lua flags:

Update screen: