Lightroom Classic quit unexpectedly (mac)

Try logging into another account (you may need to make one), still crashing? 

Try starting up in Safe mode (hold down Shift Key when booting), still crashing? 

You might want to try running a free utility like Onyx: still crashing? 

https://www.titanium-software.fr/en/onyx.html

Also view:

https://www.macworld.com/article/352902/onyx-review-macos.html

https://www.macworld.com/article/224955/how-to-reset-a-macs-nvram-pram-and-smc.html

From Adobe:

https://helpx.adobe.com/photoshop/kb/basic-troubleshooting.html

Hi there,

Thanks for reaching out. I’ll need more information so that I can help you with this issue.

Where is the catalog stored? Is it on an internal drive or an external drive?

Try resetting your Lightroom preferences (use method 2):
https://helpx.adobe.com/lightroom-classic/help/setting-preferences-lightroom.html

Copy the primary catalog in question and place it on your computer's desktop.

• Press OPT (macOS) when launching Lightroom Classic.
• Choose the option to create a new catalog and create a new one on the internal drive.

• In the new catalog, head to File > Import from Another Catalog, as shown below.
  
  

Proceed with merging the (potentially)corrupted catalog into the newly made, internal storage-based catalog. 

For more help via video-based steps, check here. See Merging individual catalogs into a master catalog. 

Please let us know if this helps.

Thanks!

Sameer K.