I added an "other calendar" to my Google Calendar. It shows up on my Google Calendar just fine, but is not appearing in my Mac Calendar. My OTHER "other calendar's" are showing up on my Calendar app, just not this one.
Note: It's the Airbnb calendar and I used the URL from Airbnb to export. Like I said, it's showing up fine in my Google Calendar, but not showing up in my Mac Calendar along with my "other calendar's" from that same calendar.