bsprague wrote:
First, you put the catalog files where you want them. The primary file is the .lrcat file. The others in the same folder are important, but less so.
Second, you open that catalog file in LR Classic. It will indicate that the links to the image files are broken. You fix that by showing Lightroom where you put them. If the folder structure is the same, re linking to the top folder should do the job.
Expanding on Bill's comments, you can update the folder locations inside LR, and that update will cascade through all the sub-folders and images impacted.
So, if the old Mac drive was //my-pictures-old/ and now the new drive is //my-pics-recovered/
You would go into the folder view inside LR and find that 'highest level' folder of the tree and right-click and update the "old" folder location, navigating and selecting the new folder name. LR will update everything that can be updated by that change. Repeat, as needed, if you have other "highest-level" locations that are different and also need updating.