From one of the users of my screensaver, I get the issue report that resolving 
the SSB does not work.
He is running macOS 10.14.6 on a Mac Mini.
I have compiled my screensaver using the current version of Xcode, under macOS 
14, but for the target macOS 10.13.

When my screensaver tries to resolve the bookmark, I get the infamous
  Code%9 "The File couldn't be opened because it isn't in the correct format."

This happens, when my screensaver is launched by the ScreenSaverEngine.
When my screensaver is running in System Preferences, in the thumbnail window, 
everything is fine, and resolving the bookmark works, of course.
Also, there are other users of my screensaver (including me), where it runs 
just fine.

For that user, the directory for which my screensaver creates the bookmark is 
on an external HD.

Below is the source code showing how I create/resolve bookmarks.

Any ideas what I could try (or the user) will be highly appreciated.

Best regards, Gabriel


Create bookmark:

        NSData * dir_bookmark = [dir bookmarkDataWithOptions: 
NSURLBookmarkCreationWithSecurityScope
                               includingResourceValuesForKeys: nil
                                                relativeToURL: nil
                                                        error: &systemError];

[no problems occur here]


Resolve bookmark:

        NSURL * dir_location = [NSURL URLByResolvingBookmarkData: bookmark
                                                       options: 
NSURLBookmarkResolutionWithSecurityScope
                                                 relativeToURL: nil
                                           bookmarkDataIsStale: & isStale
                                                         error: & error];

[at this point, dir_location == nil, and I get the error code 259.
I can still extract the path using this code:

            NSDictionary * dict = [NSURL resourceValuesForKeys: [NSArray 
arrayWithObjects: NSURLPathKey, nil]
                                              fromBookmarkData: bookmark ];
            .. = [NSString stringWithFormat: @"Orig path: %@", [dict 
objectForKey: NSURLPathKey];


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