Had to wipe mac clean. Before doing I made a copy of user file on external HD. Lightroom reinstalled but missing presets. I reinstalled most of those that were purchased but didn't find all of them, the ones I did reinstall are all out of order and I'm missing the ones I created. The catalog that I used now says alias and can't locate original, not even on time machine. Did more research and found that if you do too many jobs at once and then shut down, it may lock the catalog and sure enough, my .lrcat also had a .lrcat-locked underneath. Research said to delete it and catalog should open but it doesn't still says alias. Almost 2 weeks behind in editing, HELP!
Where was your LR catalog located before you wiped your Mac clean?