files in the temporary file location “/var/folders/3

[sarag55182640]

How do I fix Lightroom Classic, that has just given me this message: 

Lightroom cannot start because it cannot create files in the temporary file location “/var/folders/3k/w4p5k0l52lj1f59qym9k3jx40000gr/T”? I had downloaded a card that I probably corrupted when I removed it from the computer without ejecting it. Now LRC won't open at all.

[AxelMatt]

Try resetting the preferences of Lightroom Classic:  How to reset Lightroom Classic preferences (adobe.com)

It's recommended to backup your preferences before you reset the preferences to the default settings: 

https://helpx.adobe.com/lightroom-classic/kb/preference-file-and-other-file-locations.html

[dj_paige]

Find your catalog file on your hard disk and double-click on it. The default location on MacOS is /Users/[username]/Pictures/Lightroom/ (but of course it may not be in the default location)