Comment by zamnos

At the point that you're opening up the laptop and chasing traces, you can do the same thing with Apple devices (with a bit more difficulty). It's not like they're made with rainbows and moonbeams. If you're at that level of paranoia (no judgement if it's justified or not) and have the skill to, just open up the Apple device and chase PCB traces. If you go down that route, iFixit's a good resource with lots of helpful pictures. (But still sometimes not enough.)