title: App Sandbox/iCloud and Snow Leopard backwards compatibility
body: <p>By now all Mac App Store developers know that all apps must have the new OSX Lion Sandboxing enabled going forward. For existing apps, we must enable it in XCode 4.2 and set in place the data migration plist.</p>
  
  <p>So my existing Mac App Store app has a build target of OSX 10.6.8 Snow Leopard. Not only that, but it does access the webcam and also synchronizes stuff to iCal via CalendarStore API and AppleScript. I'm expecting most of my app to break when I enable the Sandbox, but when I get that working in the Sandbox I'm wondering if a Sandboxed app can run in Snow Leopard.</p>
  
  <p>Does anybody have experience in migrating to the Mac App Sandbox? I would like to know if enabling this would break Snow Leopard compatibility, and what I am up against given the entitlements my app will require.</p>
  
  <p>Snow Leopard is an awesome OS and I'd like to support it as long as reasonably possible, for those users who have a Mac not quite new enough to run Lion.</p>