Can not export in LR Classic and can not export to PS either after Mac Tahoe Update. iMac 2021 M1 RAM 16GB, memory is at 200+ GB available.

​@AxelMatt I do not get an error message.  The screen freezes and I have to force quit to exit. Additionally, when importing images into LR Classic, it loads very slowly in the Develop strip. This morning, I ran a 2nd mac reinstallation of Tahoe and it seems to export now fine to desktop and my external drive, however I noticed the loading is still very slow. 

here is the system information incase it occurs again. 

Lightroom Classic version: 15.1.1 [ 202601141538-a543b18a ]
License: Creative Cloud
Language setting: en-US
Operating system: Mac OS 26
Version: 26.2.0 [25C56]
Application architecture: arm64
Logical processor count: 8
Processor speed: NA
SqLite Version: 3.36.0
Adobe GSDK Version: 1.4.0.171

Built-in memory: 16,384.0 MB
Dedicated GPU memory used by Lightroom: 1,289.1MB / 12,124.1MB (10%)
Real memory available to Lightroom: 16,384.0 MB
Real memory used by Lightroom: 510.4 MB (3.1%)
Virtual memory used by Lightroom: 427,569.6 MB
Memory cache size: 442.4MB
Internal Camera Raw version: 18.1 [ 2420 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2
Camera Raw virtual memory: 223MB / 8191MB (2%)
Camera Raw real memory: 306MB / 16384MB (1%)

Cache1: 
Final1- RAM:195.0MB, VRAM:301.0MB, IMG_0819.CR3
NT- RAM:195.0MB, VRAM:301.0MB, Combined:496.0MB

Cache2: 
m:442.4MB, n:158.3MB

U-main: 90.0MB

Standard Preview Size: 4480 pixels
Displays: 1) 4480x2520, 2) 1920x1080

Graphics Processor Info: 
Metal: Apple M1
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Auto (S5_11)

Application folder: /Applications/Adobe Lightroom Classic
Library Path: /Volumes/Tracie SSD/Photography/Tracie's Photos/turkies photos 2026/Brynlee/0_bryn_lr/0_bryn_lr.lrcat
Settings Folder: /Users/tracieyaj/Library/Application Support/Adobe/Lightroom

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

Config.lua flags: 

​@traciey Please give us more informations about your issue and your system.

Describe more detailed what you are trying to and what happened.

Do you get error messages? If yes, please post the messages here word-by-word.

Give us also more infos about your system. Please provide a copy of your 'System Info'. This can be get from the Lightroom menu item Help > System Info. There's a copy button in the System Info dialog. Press this button and paste the info into your next forum post.