If there is a need to reinstall Mac OS helper, please follow these instructions:
1. Quit the NordVPN application completely. (Right click on the app icon in the Dock and then click Quit.)
2. Open Launchpad and select Other.
3. Now open Terminal.
4. Terminal window will appear.
5. Copy and paste the first command into the Terminal window.
sudo launchctl unload /Library/LaunchDaemons/com.nordvpn.osx.helper.plist
After pasting, click enter. Terminal now will ask for Administrator password. Type it in and click enter.
NOTE: You will not see any letters while typing, this is normal.
6. Copy and paste the following commands one by one and click enter after each of them.
sudo launchctl remove com.nordvpn.NordVPN.Helper
sudo rm /Library/PrivilegedHelperTools/com.nordvpn.NordVPN.Helper
sudo rm /Library/LaunchDaemons/com.nordvpn.NordVPN.Helper.plist
7. Open NordVPN application. It will now ask to enter Your Mac's Administrator password.