I personally did not need the extension. Found a MIT link that showed how to remove, but for some reason I cannot post the link here, so the steps are below. I only did the uninstall and the prompt was removed. I'd assume you'd be able to re-download the application if you needed. Note: There is a downloader script in inside /opt/cisco/vpn/bin , so you may be able to re-download it using that. To remove manually: $ sudo /opt/cisco/vpn/bin/vpn_uninstall.sh If you still having trouble and/or the new Cisco Anyconnect installation complains that you have a version installed, follow these steps: Enter these commands to clean out the old Cisco VPN kernel extension and reboot the system. 		sudo -s 		rm -rf /System/Library/StartupItems/CiscoVPN 		rm -rf /Library/StartupItems/CiscoVPN 		rm -rf /System/Library/Extensions/CiscoVPN.kext 		rm -rf /Library/Extensions/CiscoVPN.kext 		rm -rf /Library/Receipts/vpnclient-kext.pkg 		rm -rf /Library/Receipts/vpnclient-startup.pkg 		reboot If you installed the Cisco VPN for Mac version 4.1.08005 package, enter these commands to delete the misplaced files. The deletion of these files will not affect your system, since applications do not use these misplaced files in their current location. 		sudo -s 		rm -rf /Cisco\ VPN\ Client.mpkg 		rm -rf /com.nexUmoja.Shimo.plist 		rm -rf /Profiles 		rm -rf /Shimo.app 		exit Enter these commands if you no longer need the old Cisco VPN Client or Shimo. 		sudo -s 		rm -rf /Library/Application\ Support/Shimo 		rm -rf /Library/Frameworks/cisco-vpnclient.framework 		rm -rf /Library/Extensions/tun.kext 		rm -rf /Library/Extensions/tap.kext 		rm -rf /private/opt/cisco-vpnclient 		rm -rf /Applications/VPNClient.app 		rm -rf /Applications/Shimo.app 		rm -rf /private/etc/opt/cisco-vpnclient 		rm -rf /Library/Receipts/vpnclient-api.pkg 		rm -rf /Library/Receipts/vpnclient-bin.pkg 		rm -rf /Library/Receipts/vpnclient-gui.pkg 		rm -rf /Library/Receipts/vpnclient-profiles.pkg 		rm -rf ~/Library/Preferences/com.nexUmoja.Shimo.plist 		rm -rf ~/Library/Application\ Support/Shimo 		rm -rf ~/Library/Preferences/com.cisco.VPNClient.plist 		rm -rf ~/Library/Application\ Support/SyncServices/Local/TFSM/com. 			 nexumoja.Shimo.Profiles 		rm -rf ~/Library/Logs/Shimo* 		rm -rf ~/Library/Application\ Support/Shimo 		rm -rf ~/Library/Application\ Support/Growl/Tickets/Shimo.growlTicket 		exit Finally this. sudo pkgutil --forget com.cisco.pkg.anyconnect.vpn