Other recent OSX versions should work too. I tried this on an Apple MacBook Pro running OSX El Capitan v.10.11.6. Apple are using their own fork of racoon to manage IKE negotiation, but it will not work out of the box by just using the Network Preferences VPN GUI, without creating a separate configuration file for it.
After various attempts I managed to get Apple Mac's native VPN client to connect to a Netvanta 3120.
