Document-scope, Security scoped bookmarks for file packages

Question

I'm trying to create document-scope security scoped bookmarks for file packages. That is, directories where NSURLIsPackageKey is YES. I know you're not normally supposed to be able to create document-scope bookmarks to directories, but I would have expected packages to be exempt from that (after all, I get access to them using an NSOpenPanel which isn't allowed to select directories, but there's no problem there).

I've got my entitlements set up with com.apple.security.files.bookmarks.document-scope = true, and I'm doing a basic bookmark creation call with a file URL that I've just received from an NSOpenPanel (so I have access):

NSError *bookmarkError = nil;
NSData *bookmark = [fileURL 
    bookmarkDataWithOptions:NSURLBookmarkCreationWithSecurityScope
    includingResourceValuesForKeys:nil
    relativeToURL:[self fileURL]
    error:&bookmarkError];

After this call though, both bookmark and bookmarkError are nil.

Do I just need to give up on this and create app-scope bookmarks, even though I have a document-based app? That seems inappropriate, but I don't see another workaround.

Answer 1

I asked about this elsewhere and was told:

...we didn't implement support for it because it's complicated and there have been very few requests for it.

So that's that, you can't create this kind of bookmark because it's not implemented. I also filed a bug with Apple but the response just quoted the docs at me (i.e. telling me stuff I already knew and had mentioned in my report) before closing it. So, as of now and probably for the foreseeable future, this is not possible.