I’m afraid you have it backwards. I made only a claim that it hasn’t happened yet, based on the absence of stories that it has. That’s a negative claim, like “there’s no evidence that God exists.” It is not my burden to prove the absence of something. It is the burden of someone who makes a positive assertion (e.g. God exists) to support that claim with evidence.

While you have every right to be skeptical about the security posture of Apple hardware, that doesn’t mean the burden is on me to conclusively prove that it can withstand the possible universe of attacks against it.