I have LrC on 2 Macs. One ran out of space and I'd like to transfer most of the files from the old Mac to the newer / bigger one. What's the best way to do this, allowing me to retain LrC on both Macs? Thanks!
The easiest way is to move all the photos to an external drive, and transfer the drive from one computer to another as needed. Then you would need to point Lightroom Classic to the external drive, you can use the instructions in "Part 2 — Updating Folder Location" of this document.