I installed the latest version of LRCC. When I tried to Backup my Catalog, I got a dialog saying that my Catalog was larger than 4 GB (mine is 4.55 GB) and that I needed an app such as Stuff It. I did install Stuff It 16 for Mac, but I don't know how to use it. I don't want to screw up my Catalog. Exactly what do I do? Thanks.
Catalogs larger than 4GB are now zipped again, but they’re too big for macOS to unzip natively, so you’ll need 7-zip or StuffItExpander if you need to restore a backup.