LR classic after update v 15.0 can't work with macOS 15.6.1

[michałz25761149]

After last update, Lr work as sh... First of all switching beteween photos takes ages. It's completly unworkable in meaning of professional edit. When changes as lens blur its visible only when comare to other picture. I'm using this program professionally almost 10 years and never worked as bad as this time.

Is any chance to step back before this update? 

My iOS is Sequoia 15.6.1

working on mac Studio 2024

[nikunj.m]

Hi, thanks for reaching out, and we're sorry about the trouble! 

Please go to the Help menu in Lightroom Classic, then System Info, and copy the text. You can share the info with us by either pasting it as a reply here or in a text file and sharing the file with us. 

Meanwhile, try adding Lightroom Classic to Full Disk Access and the Accessibility list for macOS using the steps suggested here: https://adobe.ly/3Lu6Uhf

Thanks,
Nikunj

[michałz25761149]

Sorry for late reply. Here is the info you asked. I have PL language version LR but im sure you;ll manage this 😉

Wersja Lightroom Classic: 15.0 [ 202510171722-44f87028 ]
Licencja: Creative Cloud
Ustawienie języka: pl-PL
System operacyjny: Mac OS 15
Wersja: 15.6.1 [24G90]
Architektura aplikacji: arm64
Liczba procesorów logicznych: 12
Szybkość procesora: NA
Wersja SqLite: 3.36.0
Wbudowana pamięć: 65 536,0 MB
Dedykowana pamięć GPU używana przez Lightroom: 10 395,6MB / 49 152,0MB (21%)
Pamięć rzeczywista dostępna dla Lightroom: 65 536,0 MB
Pamięć rzeczywista używana przez Lightroom: 9795,0 MB (14,9%)
Pamięć wirtualna używana przez Lightroom: 429 215,9 MB
Rozmiar pamięci podręcznej pamięci: 253,6MB
Wewnętrzna wersja wtyczki Camera Raw: 18.0 [ 2389 ]
Maksymalna liczba wątków używanych przez Camera Raw: 5
Optymalizacja SIMD Camera Raw: SSE2
Pamięć wirtualna programu Camera Raw: 1603MB / 32767MB (4%)
Pamięć rzeczywista programu Camera Raw: 1863MB / 65536MB (2%)

Cache1:
Final1- RAM:36,0MB, VRAM:202,0MB, 30B2D3E5-B2F4-4779-9CF5-D606AB443295.dng
NT- RAM:36,0MB, VRAM:202,0MB, Combined:238,0MB

Cache2:
m:253,6MB, n:35,3MB

U-main: 152,0MB

Rozmiar podglądu standardowego: 2560 piksele(i)
Wyświetlacze: 1) 2560x1440, 2) 1200x1920

[Ian Lyons]

@michałz25761149 

The System Info you provided is incomplete.  Please use the Copy button in the System Info dialog to capture the entire data set, then paste into your next reply

The section missing is similar to below for reference

Graphics Processor Info:
Metal: Apple M4
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Auto (S5_21)

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/ianlyons/Pictures/LrC - Test Catalog-v15/LrC - Test Catalog-v15.lrcat
Settings Folder: /Users/ianlyons/Library/Application Support/Adobe/Lightroom

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

Config.lua flags:

[Sameer K]

Hey, @michałz25761149. Thanks for sharing part of the system info. Please check if the steps @nikunj.m shared below in this conversation help. 

Thanks!

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

[johnrellis]

"Is any chance to step back before this update?"

See here for how to roll back to LR 14.5.1:

https://www.lightroomqueen.com/roll-back-update-previous-classic/

Note that by default you'll lose any changes you made since updating LR 15.  

[dj_paige]

You could revert back to LrC 14.5.1

Isn't it Mac OS 15.6.1 and not iOS 15.6.1? I don't think LrC runs on iOS. Or are you having a problem on a mobile device?

[michałz25761149]

yes,  its OS 15.6.1. not iOS

[mtnrunner2]

 Same here but on Windows 11 25H2. After trying to upgrade to LR Classic v15 today, LRC says it can't open the converted v15 catalog due to "a data issue". I was able to go back to the prior version using the link posted here by @johnrellis , specifically in Creative Cloud > click Apps icon > then the 3 dots ("...") below Lightroom Classic >  and choose the latest 14.x version. The old catalog is backed up by the upgrade process, so just unzip the contents back to where you keep catalogs and open it.

[SergeiZ]

Same story,2 professional grade systems were flying in develop module both m3max and imac pro. 15.0 is unusable.  Reverted back to 14.5.1 

[nikunj.m · Accepted solution]

Hi @SergeiZ and @mtnrunner2, 

Please try creating a copy of the catalog you're working on, then optimize the original catalog using Lightroom Classic version 14.x by going to the File menu, then Optimize Catalog. Once done, try opening the catalog again in version 15.0. 

Let us know if it makes a difference! 
Thanks,
Nikunj

[mtnrunner2]

@nikunj.m That worked, thanks!

It's funny because when I selected the menu item to optimize the 14.x catalog, it said "Your catalog was last optimized [about an hour prior when I last exited LR]", which implies it was already optimized when I last exited the app, so why wasn't the 14.x catalog I upgraded to 15.0 the first time also optimized? 🤷‍I also back up the catalog most of the time and always select the check integrity and optimize checkboxes. Maybe when I reverted to 14.x, going back to an optimized backup helped. I don't know, but glad it works now.

[SergeiZ]

I optimized the catalog at first, it didn't help. Then i created a new one all together and imported the same photos (about 5000 photos 24mp Canon R6 and Canon R). Same performance issues. I rolled back to the older version to finish the project. I'll wait for the 15.0.1 or try it later when I'm not under pressure to finish a large project. 

[SergeiZ]

I did a clean install of the 15.0, wiped my priviews, created new ones. Restarted my can, tried all kinds of GPU settings in preferences, cleared my cashes. Restarted my mac multiple times. The best i could achieve was a very sticky/laggy develop performace when I move from file to file. There's something else going on in the develop module of the new version that slows the performance. The algorithm in the 14.5.1 is 2,5 times faster at displaying and moving to the next photo in develop module.  I had to switch back, the 15.0 is not good. Please emply the same algorithm for develop module behaviour from the older version, it is much snappier. 

[ExUSA]

Maybe try updating to Sequoia 15.7.1 as well.