GDPR applies to persons and businesses. The fact that you're violating GDPR, because without your knowledge Apple has deployed software on your computer that compiles this knowledge graph makes Apple complicit. Imagine violating a speed limit, because your car's speed indicator has a software flaw that causes it to show a lower speed.

This is not equivalent at all. You don’t need to create a GDPR notice because the user types their personal info into their own documents for example, despite you being on the path of it going to disk.