That might be a different issue. How many security scoped bookmarks are currently active in your app? There is a limit of ~2500 active ones. Maybe you are forgetting to call stopAccessingSecurityScopedResource on the unused ones.
galad87
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Does it show if you call VTRegisterSupplementalVideoDecoderIfAvailable() first?
You should really update then, the first major release is usually buggy.