I love this game so much
It should be there! Let me know if it's not.
Use this map to find it, the content is on the north end of the island:
https://voxelse.github.io/aShortHike/interactiveMap/
the new version seems unclassified as a mac install?
https://www.evernote.com/l/AkUtmyP73IZD0qQhm-dT6NdBJnTd4WRwK5o