Sandboxed app & NSOpenPanel causes crashes

Question

I am doing a simple file open panel in my Cocoa app. I enable entitlements and app sandboxing. But on OS X 10.9, when the app should open a dialog using NSOpenPanel

Answer 1

Indeed, you have to specifically allow Read/Write permissions on User Selected Files. In Xcode 5.1 this is under Capabilities - App Sandbox.