I was thinking kernel to/from outside kernel IPC, sorry for the ambiguity. Some documentation can be found at https://developer.apple.com/library/archive/docume

I was thinking kernel to/from outside kernel IPC, sorry for the ambiguity. Some documentation can be found at https://developer.apple.com/library/archive/documentation/Darwin/Conceptual/KernelProgramming/Mach/Mach.html#//apple_ref/doc/uid/TP30000905-CH209-TPXREF104 https://developer.apple.com/library/archive/documentation/Da...