I'm glad to hear about those internal processes, but I guess the key point of difference is that in apple's case, the measurements of the firmware are provided and verifiable externally.
Although in the end, I'm not sure how much of a difference it makes, as ultimately, even with measurements of the whole stack, the platform provider if compelled to do so, can still push out a malicious firmware that fakes it's measurements.
Although in the end, I'm not sure how much of a difference it makes, as ultimately, even with measurements of the whole stack, the platform provider if compelled to do so, can still push out a malicious firmware that fakes it's measurements.