How can I determine what application is asking "Where is GrowlHelperApp.App?" I recently upgraded to OS X 10.9 Mavericks and am now seeing a "Choose Application" dialog pop up every minute or two asking: "Where is the GrowlHelperApp.app?". I don't particularly want to buy the new version of Growl, so how can I determine which application is looking for it so that I can change it's preferences or remove it?



Update: It turns out that it was an old Dashboard widget that was looking for Growl. I found this out by deleting all of my Dashboard widgets since I haven't used it in a while, but I'd still be interested in finding out how one would discover what is launching this dialog.
You could have used sudo opensnoop to see what files are being opened or fseventer to see what files are being modified.

Those dialogs are often shown by AppleScripts that have reference a missing application. You could also have tried running mdfind GrowlHelperApp, but it doesn't search the contents of compiled scripts or scripts saved as applications.