Connect your Mac with remote networks where you are. Try VPN Tracker, the leading VPN client for Mac OS X today. The free demo license will allow you to test all features of VPN Tracker with two limitations: Your VPN will be disconnected after a few minutes and the export is disabled.
VPN Tracker 365 is compatible from OS X El Capitan backwards till Mac OS X 10.5. When buying VPN Tracker 365 you can connect all of your Macs to your VPN using the following versions:
VPN Tracker 365 for OS X 10.11 El Capitan, OS X 10.10 Yosemite and OS X 10.9 Mavericks