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Known Participant
Sep 18, 2025 2:21 AM UTC
Question

Lightroom is very slow

Hi,

I am using LightRoom and it is very slow. Earlier my profile was 2 yers old and now I created another profile but still is very slow. Photshop work fine. I copeid my system info. Anyone could please find issue?

 

Lightroom Classic version: 14.5.1 [ 202508231203-c2638d01 ]
License: Creative Cloud
Language setting: en-US
Operating system: Mac OS 15
Version: 15.5.0 [24F74]
Application architecture: x64
Logical processor count: 16
Processor speed: 3.8GHz
SqLite Version: 3.36.0
Built-in memory: 16,384.0 MB
Dedicated GPU memory used by Lightroom: 10,830.2MB / 8,176.0MB (132%)
Real memory available to Lightroom: 16,384.0 MB
Real memory used by Lightroom: 4,561.6 MB (27.8%)
Virtual memory used by Lightroom: 55,744.0 MB
Memory cache size: 1,100.9MB
Internal Camera Raw version: 17.5 [ 2318 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 3078MB / 8191MB (37%)
Camera Raw real memory: 3370MB / 16384MB (20%)

Cache1:
Final1- RAM:352.0MB, VRAM:0.0MB, 0Y6A6528.CR3
Final2- RAM:562.0MB, VRAM:950.0MB, 0Y6A6521.CR3
Final3- RAM:352.0MB, VRAM:0.0MB, 0Y6A6522.CR3
NT- RAM:1,266.0MB, VRAM:950.0MB, Combined:2,216.0MB

Cache2:
m:1,100.9MB, n:1,057.0MB

U-main: 240.0MB

Standard Preview Size: 5120 pixels
Displays: 1) 5120x2880

Graphics Processor Info:
Metal: AMD Radeon Pro 5500 XT
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Auto (S5_7)

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/sushma/Pictures/2025_year_from_july/2025_year_from_july.lrcat
Settings Folder: /Users/sushma/Library/Application Support/Adobe/Lightroom

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

Config.lua flags:

 

 

7 replies

Ian Lyons
Community Expert
Community Expert
Sep 18, 2025 4:56 PM UTC

The System Info suggest the OP is using a Intel based iMac or MacBook. The following line in System Info needs further investigation as the system appears to be using more VRAM than is installed.

 

> Dedicated GPU memory used by Lightroom: 10,830.2MB / 8,176.0MB (132%)

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dj_paige
Legend
Sep 18, 2025 11:29 AM UTC

Slow doing what? Please be specific and detailed.

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Known Participant
Sep 20, 2025 4:00 PM UTC

Editing of photographs, making mask, chaing exposure or any values. Takes too much time to export few images. 

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dj_paige
Legend
Sep 20, 2025 7:25 PM UTC

Your GPU is 5 years old, and relatively slow compared to more recent GPUs, which can have an impact on your system which has a 5K monitor. As an experiment, try reducing the resolution of your monitor to something like 1920x1080, does that make LrC run faster?

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nikunj.m
Legend
Sep 18, 2025 11:12 AM UTC

Hi, thanks for reaching out! 

You can try updating macOS to version 15.7 to check if that makes a difference. If not, you can try to reset the preferences of Lightroom using the steps mentioned here: https://adobe.ly/3W1g9aJ


Thanks,
Nikunj

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