The equivalent for AMD CPUs is called the Platform Security Processor (PSP). I am not aware of a way to disable it. I don't know about Apple CPUs but they defi

The equivalent for AMD CPUs is called the Platform Security Processor (PSP). I am not aware of a way to disable it. I don't know about Apple CPUs but they definitely have co-processors running besides the main CPU. In fact, many people talk about the IME but the practice of having proprietary systems with their own privileged hardware is the norm nowadays. Another example is the "baseband" processor in phones, it is a complete proprietary system with its own processor, OS, etc... and it controls the modem, among other things.