There is - it's called the "Secure Enclave." However, it is just another block on the processor and isn't this always-running ghost system underneath you. It ca

There is - it's called the "Secure Enclave." However, it is just another block on the processor and isn't this always-running ghost system underneath you. It cannot be shut down once started without a reboot - but it is completely up to you whether to start it in the first place. So, if you don't start the Secure Enclave and load its Apple-signed firmware, it will just sit there dark and unused.