I am trying to share a Lightroom 5 catalog between my account and my wife's on an iMac. I have put the catalog files into a folder in \users\shared and made sure that the permissions for both of us are Read/Write. When I switch to my wife's account and start up Lightroom the preview files do not show in the Library. If I delete the preview file and regenerate them they show, but when I then switch back to my own account they are not showing there.
Is there any way round this. Is sharing a catalog on a local drive possible? I have read posts suggesting that people have managed this.