Which might sound well on paper but would be hell to actually do. iMessage and Signal are not 1-to-1 in their feature set nor is iMessage a superset of Signal.

Which might sound well on paper but would be hell to actually do. iMessage and Signal are not 1-to-1 in their feature set nor is iMessage a superset of Signal. Also I find it odd that you are pushing for shoving a square peg in a round hole vs signal actually writing a native mac app. I'm not sure why it's iMessage's "fault" they have the "only" native messaging platform app for macOS.