I cannot install Cisco Anyconnect VPN on Mac OS X as the VPN package is greyed out during installation. What should I do?
The VPN package is greyed out (as shown in the screen capture below) due to incomplete/unclean installation of VPN client.
To resolve the issue, please follow the steps below to remove the Cisco Anyconnect VPN client from your Mac OS X and re-install it again.
Note: If your Mac user account has no password (a blank password), you must give it a password before proceeding the procedures below. Please refer to Apple support site https://support.apple.com/en-hk/HT202860#knowpassword  to change your password.
- From Finder menu, choose Go and then click Utilities.
- Click Terminal.app App.
- Type the following at the command prompt, press Enter, then enter Mac user account account password.
sudo pkgutil --forget com.cisco.pkg.anyconnect.vpn