Known Participant

P: Lightroom Classic v15.4/15.4.1 Causes AI Assist Culling Memory Leaks, Mac Freezes, and Denoise Failures

Forum|Forum|24 days ago
July 2, 2026
1 reply
66 views

What an awful release. Don't get me wrong, I'm glad to see new developments, but this Lightroom update is an absolute disaster. After culling just 5-10 images, the AI Assist culling tool completely hogs all my RAM, causing my Mac to freeze and throw memory errors. It’s a total nightmare.

Culling images via the library module is practically impossible right now - everything just locks up. Even with previews pre-generated and trying to run AI Assist culling, the performance is still abysmal. On top of that, it frequently fails to even generate a Denoise. What is going on, Adobe?! This is absolutely unacceptable!

P.S. The RAM management is completely broken and goes beyond any acceptable limits!

Pinned Reply By Sameer K

Thanks for bringing this up. The team is working on this.

Best,

Sameer K

Community Manager

Thanks for bringing this up. The team is working on this.

Best,

Sameer K

K

Kerstin.Messing

Participant

I can reproduce another issue in Lightroom Classic 15.4.1 on macOS Sonoma 14.6.1 (Apple Silicon M1).

Denoise works correctly on a single RAW image.

As soon as I select two or more RAW images and run Denoise, only the first image keeps the Denoise result. All following images lose the Denoise update afterwards.

Masks save correctly.

Already tested:

Preferences reset
Imagen plugin disabled
Internal SSD
External SSD
Multiple catalogs
Same behaviour everywhere.

This issue is 100% reproducible on my system.

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