This is unfortunately a bug with NFS on macOS Sierra.
We have a workaround in place that’s ran whenever you [re]start the site but it’s not a permanent fix.
In the meantime, you can disable macOS Sierra’s gatekeeper functionality but this can pose a potential security risk. If you’re willing, here’s how:
- Open Terminal
- Run
sudo spctl --master-disable
To re-enable it, simply run sudo spctl --master-enable