I migrated my LR 5.7 catalogue to two new Macs; an Air 11” for travel and a MBP/retina 15” for home. Joined the CC and upgraded to LR 6; my catalogues have been updated. In my old MBP setup, I store my photos (Canon RAW) on an external hard drive (LeCie, 1TB) and regularly backed it up, twice (2 - Seagate 2TB). I want to migrate to one of the Seagate drives as my main external drive….
How do I get my LR catalogue to point to the Seagate drive and make the transition permanent?
Use Finder to drag the folders to the Seagate drive. After they are copied go to the LR Library and right-click (control-click) on the folder name and choose Update Folder Location (see Ian’s fig 8 at the link below)
LR will automatically update the catalog links and the folders will disappear from the old location. Once you are happy with everything, you could delete the images from the LeCie drive or keep them as an extra backup.