P: Unable to relaunch after File>New Catalog/Switching catalogs, or relaunching with certain plugins

After updating to the latest version of Lightroom Classic, on quit it stopped responding after saving the backup file. A forced quit is required to end the program. After much troubleshooting, I've narrowed it down to the Tourbox Console Plugin. Updating the plugin doesn't resolve the conflict. Disabling the plugin prevents the hanging quit (after LR is restarted without the plugin enabled). Has anyone else encountered this issue or found a workaround?

Every time I quit Lightroom Classic 14.5, it freezes, and I have to Force Quit.

I have reset the LRC preferences & uninstalled, then re-installed.

I have an Apple M2 Pro Mac mini with 32 GB RAM running macOS 15.6

Here is a copy of the LRC System Info

Lightroom Classic version: 14.5 [ 202508061311-4cef2162 ]
License: Creative Cloud
Language setting: en-CA
Operating system: Mac OS 15
Version: 15.6.0 [24G84]
Application architecture: arm64
Logical processor count: 12
Processor speed: NA
SqLite Version: 3.36.0
Built-in memory: 32 768,0 MB
Dedicated GPU memory used by Lightroom: 453,4MB / 21 845,3MB (2%)
Real memory available to Lightroom: 32 768,0 MB
Real memory used by Lightroom: 1 987,6 MB (6,0%)
Virtual memory used by Lightroom: 413 363,7 MB
Memory cache size: 402,0MB
Internal Camera Raw version: 17.5 [ 2318 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2
Camera Raw virtual memory: 5MB / 16383MB (0%)
Camera Raw real memory: 8MB / 32768MB (0%)

Cache1:
NT- RAM:0,0MB, VRAM:0,0MB, Combined:0,0MB

Cache2:
m:402,0MB, n:0,0MB

U-main: 150,0MB

Standard Preview Size: 5120 pixels
Displays: 1) 5120x2880, 2) 5120x2880

Graphics Processor Info:
Metal: Apple M2 Pro
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: /Volumes/Photo/Lr_Catalog/Lr_Catalog-Master-v13-3.lrcat
Settings Folder: /Users/jlf/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Canon Print Studio Pro
4) Flickr
5) Nik 7 HDR Efex
6) Plugin Parameters
7) Topaz Photo AI
😎 Tourbox

Config.lua flags:

Thanks for any suggestions

Revert back to the older version of LRC 14.4  everything will work fine

Hi - I've tried everything that has been suggested but still my issue persits - any other ideas??

bonjour depuis peu je ne peu plus fermer LRC correctement. Je suis obligé de forcer l'arret. J'ai la derniere version mac sequoia 15.6 sur mac studio M4 36 gb. J'ai aussi la derniere version LRC.

yep - 3:30 AM and just found the same problem 

Can't quit LR with MIDI2LR enabled

If you’re using the TourBox app, make sure to quit TourBox before closing LrC14.5.
That solved the issue of LrC 14.5 hanging for me.

I am running Lightroom Classic 14.5 on a 2025 Mac Studio with M4 Max processor and 36GB of RAM.  Everytime I try to close the app it just hange (spinning beachball) and I have to force quit it.  I have reset the app preferences, disabled plugins and even uninstalled and reinstalled LrC and nothing has fixed it.  Any ideas?  Thanks all.

I create seperate catalogs for each client shoot and store them on the internal Mac hard drive while working on them.

Lightroom Classic version: 14.5 [ 202508061311-4cef2162 ]
License: Creative Cloud
Language setting: en-US
Operating system: Mac OS 15
Version: 15.6.0 [24G84]
Application architecture: arm64
Logical processor count: 12
Processor speed: NA
SqLite Version: 3.36.0
Built-in memory: 65,536.0 MB
Dedicated GPU memory used by Lightroom: 16,984.3MB / 49,152.0MB (34%)
Real memory available to Lightroom: 65,536.0 MB
Real memory used by Lightroom: 4,697.5 MB (7.1%)
Virtual memory used by Lightroom: 424,619.8 MB
Memory cache size: 4.3MB
Internal Camera Raw version: 17.5 [ 2318 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2
Camera Raw virtual memory: 1000MB / 32767MB (3%)
Camera Raw real memory: 1272MB / 65536MB (1%)

Cache1:
Final1- RAM:1,107.0MB, VRAM:13,161.0MB, DSC_8554.NEF
NT- RAM:1,107.0MB, VRAM:13,161.0MB, Combined:14,268.0MB

Cache2:
m:4.3MB, n:188.7MB

U-main: 73.0MB

Standard Preview Size: 3840 pixels
Displays: 1) 3840x2160

Graphics Processor Info:
Metal: Apple M2 Max
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Auto (S5_48)

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Users/christopherchase/Pictures/Jon-Emily-Photoshoot/Jon-Emily-Photoshoot.lrcat
Settings Folder: /Users/christopherchase/Library/Application Support/Adobe/Lightroom

Installed Plugins:
1) AdobeStock
2) Aperture/iPhoto Importer Plug-in
3) Flickr
4) Impossible Things
5) Impossible Things Help
6) TourBox

Config.lua flags: