I attempted to install MAC Big Sur and cannot now find my Lightroom catalog.
Suggestions?
Sorry!
Sorry Mike, I hope it goes faster than my Big Sur update. I lost my Nik Collection, but I found it in Adobe 2020 plugin folder, I just drug it into Adobe 2021 plugin folder , Bingo problem solved.
Amazing that developers don't buiild in precautions in their expensive apps to protect their customers priceless treasures and prevent heart attacks
They do. The OP asked about Lightroom Classic. Adobe builds in an automated catalog backup system. It is on by default, but can be turned off. Additionally, Lightroom Classic is completely non-destructive in that it only reads from your image files, it never writes to or modifies the originals.