I suppose it’s certainly possible. But a Hackintosh operates at a very low level, making macOS believe it is running on supported hardware. It doesn’t need to k

I suppose it’s certainly possible. But a Hackintosh operates at a very low level, making macOS believe it is running on supported hardware. It doesn’t need to know how the OS authenticates itself to iMessage. My suspicion is that disassembling that whole process would take a lot of work (and be very brittle, because Apple would probably deliberately break it) It presumably also integrates into the OS at a deep level: the system that pushes messages to the computer is not iMessage specific, it’s OS-level. So you’d need to reverse engineer that, too.