I have had a lot of troubles since i bought a new iMac 24 with only 8 GB RAM. It just doesn't work with Lightroom.
My seven year old MacBook Pro is faster and more reliable than the new iMac.
The latest issue appeared a while ago when Lightroom stopped producing proper jpgs from my RAWfiles.
Lightroom make kind of a preview, but the file has no size. It is 0 MB and unreadable.
Yesterday I installed the latest version of Lightroom. It didn't help at all.
I have checked all the jpg-settings in the export menu. They seems to be correct.
Any suggestions for what to do