LR Classic 13.4 Crashes on MacOS 14.6.1

[MinutemanIII]

Have been noticing since installing LRC 13.4, performance on my M1 iMac is very slow and now is causing serious crashes.  

HW: iMac M1, 8GB RAM, LR catalog lives on an external M.2 drive.  Been using this drive and hardware for several years without a problem.  Disk Utulity shows external drive is fine.

I have a large catalog (~2,5TB) setup on the M.2 with 1 folder per year, and subfolders using the YYYYMMDD_TITLE format.

Since installing 14.6.1 yesterday, I tried to access a 2019 folder.  LR indicates there is noting there and I get a spinning beachball.  In a minute or two, LR crashes AND I get a notification that the external droive has been ejected.  My iMac requires a reboot for the M.2 drive to be recognized agaion.

Acccessing the past couple of jobs/subfolders in the 2024 folder on the M.2 is OK ... slow ... but no crash.

I can access the entire M.2 drive through Finder, and with other image programs such as NX Studio (Nikon) and NIK, without an issue.  Verified that I can edit ffiles in the 2019 folder normally using both apps..

Prior to the past few days, I could access ALL images in all yerars/subfolders in LRC without a problem.

Any ideas/suggestions?

Ken

[CMass]

Did the slowness start before or after installing LrC 13.4. Have you already tired optimizing your performance? Check out this page: https://adobe.ly/46Dki9A

If you move a folder to your desktop and try to access it from there is the performance and faster or the same? 

^CM

[MinutemanIII]

1)  It's been slower since installing 13.3.  13.4 improved opening somewhat but still slower than prior to 13.3 (same exact hardware setup for several years ... no previous issues)

2)  Moving this particular folder to the desktop is not a problem ... works perfectly.

FYI - Attached is the report generated by the latest crash, this morning.  Crash also caused the external M.2 to be force ejected., necessitating a reboot to regain access.  Nothing like this ever happened prior to 13.4.  Also, access to all of my images/folders through other apps (Nikon NX Studio, NIK Apps, Luminar NEO, and a demo version of Capture One) work perfectly.

Ken

[Rikk Flohr: Photography · Accepted solution]

Please perform a Clean Lightroom Install of LrC 13.5 (released today) and advise if you still see the crash. 

Procedure

1. Verify 13.5 is available in your CC app
2. Close Lightroom
3. Restart the computer
4. Use the Adobe Creative Cloud App to uninstall Lightroom
5. Restart the computer
6. Install Lightroom via the Creative Cloud App without launching any other programs.
7. Restart the computer
8. Launch Lightroom
9. Wait 5 minutes 

[MinutemanIII]

Did this and seems to be a great improvment!!  Thanks so kuch for your advice!!

Ken