LrC not rendering previews since 15.1, old previews are fine

Question

Ive just got the new version, as I was away from my computer for a while.

I importet a bunch of Tiffs as well as some NEFs from my SD card. In both cases LrC doesnt create the previews, the sqaures in the gallery just stay grey. If I switch over to the dev module the image shows, and i believe it also renders a preview. The preview shows also then in gallery, but only for 3 images at a time, if i click a fouth one, the first one turns grey. Very weird.

Also if I try to force new previews, the progress bar just wont move and nothing happens.

Old previews are fine. I've also tried deleting the preview file, but didnt change anything. Setup and everything is the same.

Running on a MBP 2018 on 16GB Ram and Sonoma. Is maybe that the problem? Is Sonoma not supported anymore? If so can I revert back to an older LrC version?

Help, please?

johnrellis · Accepted Answer

1. Please do the LR menu command Help > System Info and copy/paste the entire contents here so we can see exactly which versions of hardware and software LR thinks you're running and important LR options that are set.

2. Set the option Preferences > Performance > Use GPU For Preview Generation to Off and restart LR. Does that help?

3. Try resetting LR's preferences:
https://www.lightroomqueen.com/articles-page/how-do-i-reset-lightrooms-preferences/

LR sometimes soils its preferences file, and resetting it can fix all sorts of wonky behavior. That article explains how to restore the old preferences if resetting doesn't help.

4. Perhaps the catalog's previews database is corrupted. In the catalog folder, delete the file <catalog>Previews.lrdata. That will force LR to generate all previews.

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