From my understanding, many Apple chips are custom, and I assume much of their firmware is too. What your asking is for Apple to support third party knock off chips in their firmware and drivers which were most likely reverse engineered to "get it close to functional". That's a bit silly.
Imagine getting upset that an Occulus firmware update didn't work with a knock off HMD that lacked features of the original...
Imagine getting upset that an Occulus firmware update didn't work with a knock off HMD that lacked features of the original...