Thank you for sharing the relevant links they were really helpful. After going through this answer we need to rethink the architecture, will get back you after going through the Technote 2083 in detail. Thanks Again!

Our use case is for Mac M1, are there any POSIX shared memory compliant APIs or the only option is to use system commands from the App? The documentation says : "The focus is on IPC messaging but you can use those messages to carry shared memory regions if you want" is there code reference available for this?