title: "xxx.app" is damaged and can’t be opened
body: <p>I develop a app and make it to a dmg file, the app is codesigned by Apple developer ID.  The dmg in local can be opened and the app is also can be opened, but when i upload the dmg to server (such as S3, Akamai) and then download it, the dmg can be opened but the app cannot be opened, it says <code>"is damaged and can’t be opened..You should eject the disk image."</code>.The md5 of the two dmg are the same .Anybody knowns what's the matter of the file, how can i resolve this issue?</p>
  
  <p>My security setting is using "App store and identified developer" and i don't want to change it to "Anywhere"</p>