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macOS - Resource fork, Finder information, or similar detritus not allowed  

Prominent Member Admin
Joined: 8 years ago
Posts: 901
Topic starter  

When signing you application, sometimes you can get the unexpected "resource fork, Finder information, or similar detritus not allowed" error message.

This refers to additional files and/or information stored in your .app bundle.
Code signing no longer allows any file in an app bundle to have an extended attribute containing a resource fork or Finder info.

To see which files are causing this error, run this command in Terminal:

You can list the extra's like so:

$ xattr -lr <path_to_app_bundle>

and you can clean them up like so:

$ xattr -cr <path_to_app_bundle>

According to Apple:
Note that browsing files within a bundle with Finder's Show Package Contents command can cause Finder info to be added to those files.