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> the other 2 are iOS kernel for touchbar and controller On Intel yes, as it's managed by the T2 chip which runs bridgeOS (which IIRC is based on watchOS rathe
by messe 6y ago
> the other 2 are iOS kernel for touchbar and controller
On Intel yes, as it's managed by the T2 chip which runs bridgeOS (which IIRC is based on watchOS rather than iOS, but it's XNU all the way down regardless). On M1 chips the controller functions have been integrated into the M1 chip, and I was under the impression that the touchbar was too; i.e. it's now controlled directly by macOS.
- adolph 6y agoWithin the M1 is a “Secure Enclave” for the stuff that was formerly in T1. Does that mean that there is an iOS running inside the macOS? https://support.apple.com/guide/security/secure-enclave-sec59b0b31ff/web https://support.apple.com/guide/security/secure-enclave-sec5...
- SllX 6y agoNo. From the document you cited: “ The Secure Enclave Processor runs an Apple-customized version of the L4 microkernel. It’s designed to operate efficiently at a lower clock speed that helps to protect it against clock and power attacks. The Secure Enclave Processor, starting with the A11 and S4, includes a memory-protected engine and encrypted memory with anti-replay capabilities, secure boot, a dedicated random number generator, and its own AES engine.” iOS still has an XNU kernel. L4 is a different beast entirely and being used for a different role here.