How to fix vagrant error “tee: /etc/exports: Operation not permitted”

Also, how to fix “nfsd service does not appear to be running”

This solution is for Mac users only – thanks CW.

Short answer:

1. Open “System Settings”
2. Unlock padlock
3. Select “Full Disk Access”
4. Add “Terminal” (or whatever you use)
5. Close padlock
6. Restart Terminal (if open)