Icons for macOS setups you build using this advanced installer, as well as apps you deploy with it, don't have to worry about their icons being placed in squircle jail:
installaware.com/iamp
The tool takes care of it all using documented macOS APIs, and overrides the squircle jail defaults to display your original icons - exactly as they were designed to appear!
Star the source code repository at github.com/installaware/iamp - and build it from sources free.
