Hello, I am not a developer but my Mac has such a serious problem I am desperate for help. After some time of being open, all text applications lose the ability to drag selected text. This may happen after a few hours or a few days. Relaunching the affected apps fixes it by setting drag delay to normal. This problem started some years ago in version High Sierra and I have been living with it since then. I had set a custom drag delay from earlier versions by saying defaults write -g NSDragAndDropTextDelay -int 100 This worked until High Sierra when the current trouble started. Now I am running the latest Mojave. The problem is obviously in my preferences files but which one and can I delete the offending setting with XCODE PLIST editor? Thanks for any help.