Need to recover work I did in Lightroom. I had to do a Time Machine restore to the state my iMac was in 3 days ago. Before I did that I saved a copy of the Lightroom file, including the LR backup files, seperately on a backup disc. Now that the iMac is restored to 3 days ago, can I recover work done in the last 3 days by replacing the Lightroom file in restored state with the version I saved, which includes a backup Lightroom did last night?
Yes, replacing the old (restored) catalog with the current (saved) catalog will bring you back to current for your work.
Of course, this all assumes that the Time Machine handling has all your original images still on the hard drive.