Is there a way to prevent a single application from ever connecting to the internet? I have a program that always tries to update itself on startup, but the update breaks it. The preference to never check for updates isn't saved between each quit, and if it detects an update it will start downloading automatically, without my consent. I've tried using the Security section in SysPrefs to block incoming connections, but that just leaves it stuck at 0% downloaded, instead of stopping the entire process. I'm stuck with disabling Airport, starting the application and getting past the main menu, and then re-enabling Airport, which is starting to become a pain. Any help is greatly appreciated. Edit: I'll use Little Snitch if necessary, but I only need to block the one application. If there's some kind of Terminal command or .plist file I could edit instead of spending $30 on Little Snitch, I'd like to take that route.