Haskell for Mac
<i>As required by the Mac App Store, Haskell for Mac is sandboxed. Consequently, Haskell code executed in a Haskell for Mac playground cannot access any data except for Haskell for Mac documents, the app container, and those system files white-listed by the operating system.  Any attempt to access other files or to initiate a network connection will be rejected by the operating system.</i><p>This seems unnecessarily crippling.  Is this really required of desktop App Store apps?