Have a look at OS X Code Signing In Depth
Beginning with OS X version 10.9.5, there will be changes in how OS X recognizes signed apps
Structure your bundle according to the expectations for OS X version 10.9 or later:
- Only include signed code in directories that should contain signed
code. - Only include resources in directories that should contain
resources. - Do not use the –resource-rules flag or ResourceRules.plist. They
have been obsoleted and will be rejected.