This is my first time trying to create a macOS app. The idea for the app is simple, I just have no idea how to go about it. Any advise or suggestions would be greatly appreciated. I have 2 Mac's on the same network but no internet connection. I have set up the network and file transfer is working perfectly. I want to create an application that will allow me to push button on one Mac and display a message on the other Mac. Any advise?