I had a folder with about 900 (raw) photos that I wanted to get rid of, so I did a delete folder operation. Well, it took a long time (over half an hour, I didn't sit in front of the computer the whole time), then I quit Lightroom and deleted the folder in the Finder.
I later noticed that Lightroom was still running, but the activity monitor showed it as not responding. The next time I started, it told me that it had to fix the catalogs (presumably from the force quit), but after it did that, the folder still appears, only with a ? icon because the actual finder version is missing.
So I tried to remove it again, and the same thing happens (very long deletion process, then LR hangs on quit). How can I get rid of this folder?
I'm running LR4.1 on MacOS 10.8.
When you synchronize folders, you have the option of adding files that have been added to the folder but not imported into the catalog, removing files that have been deleted, and scanning for metadata updates. The photo files in the folder and all subfolders can be synchronized. You can determine which folders, subfolders, and files are imported.
try to remove pictures from the catalog while syncing...
It may be faster to select the images in Lightroom, press Delete key, and pick the Remove option instead of the Delete from Disk option. That does no more than clear those selected images out of the Catalog, and mark the cached previews for deletion. Since these are pure database-style tasks they should (afaik) be simple and quick for LR to carry out.
The folder will still be showing in the LR Folders panel, now with 0 images inside it, but you can Remove that entry also (provided you do not have any images still imported which live in subfolders of that). Again this is a database task only.
Then it is up to you what you separately do with that physical folder and the physical files inside it, externally, using Finder - since LR will no longer know or care about them.