I recently wrote up an article on some of the new malware safeguards in Snow Leopard. Well, turns out some people want to disable some of it. So you know the prompt that you are downloading an application that then asks you if you want to open it since it’s been quarantined. Well, you can disable it (not that you should but I’ve seen a couple of cases now where I needed to. To do so you’re going to place an LSQuarantine key into the com.apple.LaunchServices.plist. To do so, run: defaults write com.apple.LaunchServices LSQuarantine -bool NO To set it back to normal: defaults write com.apple.LaunchServices LSQuarantine -bool YES