AI Noise Reduction not working in Lightroom Classic Mac

[Reddfoxx141]

I went to go and use AI noise reduction today in Lightroom Classic on my mac and all it does is come up with a loading box saying "applying denoise" with a loading bar then disappears without doing anything. After doing this once, it won't let me apply ai denoise again or to any other photos without restarting and still it doesn't do anything to the photos. The same goes for Raw details and super resolution. Anyone have any idea why this is happening? I don't use AI denoise super often but I want my product to actually work

[johnrellis]

Please do the LR menu command Help > System Info and copy/paste the entire contents here so we can see exactly which versions of hardware and software LR thinks you're running and important LR options that are set.

[edtech21]

Same exact problem here, and I've been using it for a long time before a recent update I'm assuming. Did you find anything out? Denoise works fine in Lightroom but not Lightroom Classic.

[ExUSA]

Please post your system info, it could be a related issue or something totally different.

[edtech21]

Lightroom Classic version: 15.0.1 [ 202511041508-dddee541 ]
License: Creative Cloud
Language setting: en-US
Operating system: Mac OS 26
Version: 26.1.0 [25B78]
Application architecture: x64
Logical processor count: 16
Processor speed: 2.3GHz
SqLite Version: 3.36.0
Adobe GSDK Version: 1.4.0.171

Power Source: Plugged In, 100%
Built-in memory: 65,536.0 MB
Dedicated GPU memory used by Lightroom: 0.0MB / 0.0MB (0%)
Real memory available to Lightroom: 65,536.0 MB
Real memory used by Lightroom: 2,242.4 MB (3.4%)
Virtual memory used by Lightroom: 39,017.1 MB
Memory cache size: 39.6MB
Internal Camera Raw version: 18.0 [ 2389 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 567MB / 32767MB (1%)
Camera Raw real memory: 671MB / 65536MB (1%)

Cache1:
Final1- RAM:549.0MB, VRAM:0.0MB, IMG_8982.CR3
NT- RAM:549.0MB, VRAM:0.0MB, Combined:549.0MB

Cache2:
m:39.6MB, n:188.8MB

U-main: 102.0MB

Standard Preview Size: 3584 pixels
Displays: 1) 3584x2240

Graphics Processor Info:

Init State: GPU Unsupported
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Off (S0_0)

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/dominicvitobarone/Pictures/Lightroom/Lightroom Catalog.lrcat
Settings Folder: /Users/dominicvitobarone/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Flickr

Config.lua flags:

[johnrellis]

@edtech21: "Operating system: Mac OS 26
Application architecture: x64

Graphics Processor Info:

Init State: GPU Unsupported"

You've got an older Intel Mac, and for some reason LR thinks its GPU is unsupported. 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.  After doing that, go to Preferences > Performance > Camera Raw to verify that Use Graphics Processor is set to Auto. If you see any kind of "unsupported" message, please post a full-resolution screenshot  (not a phone pic) of the Preferences window. 

[ExUSA]

Nope. No Intel Mac that is officially supported by Tahoe has a 2.3GHz processor. I assume you are using Open Core to install the OS?

If so, this is not supported and likely not going to work.