When I try to run PDI on Mac OS Catalina I get this error:
App Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app's Info.plist file.
I have tried to update Info.plist and Info.plist~ as suggested here. I also took the application out of mac quarentine as suggested here and I'm allowing applications from anywhere to run (System Preferences > Security & Privacy)
I also tried different versions of PDI (8, 8.1, 8.2, 9) and no success.