Not sure if Fortinet makes it impossible to find the FortiClient SSL VPN application for Mac OSX on purpose or not but it appears to be free for the simple client version so I wanted to provide a location to download the client easily. On Windows you can bring up Internet Explorer and make a SSL VPN connection easily but since IE is not available on OSX it is necessary to have the stand alone FortiClient SSL VPN application. Be careful if you are going to download the Fortinet FortiClient elsewhere as if it is anything other than the simple SSL VPN client it is really bloated.
Download Fortinet FortiClient SSL VPN For OSX
Please be aware that the above URL will not be updated on a regular basis so if you can find a newer version of the forticlientsslvpn.dmg file you may want to use that version instead. Again I just wanted to provide a download for this client since it seemed harder than it should be to locate.
Once you download and double click the DMG file it will install forticlientsslvpn.app on your OSX device. The configuration mirrors what would be configured if you are able to make a connection on Windows via Internet Explorer. Below is an example of what options you would need to input to make a successful connection including IP address of the Fortinet firewall, the port the SSL VPN connection is listening on, username, and password.
Fortinet FortiClient SSL VPN On OSX Example:
As you can see by the download of around 250K and the above image the FortiClient SSL VPN application for the Mac is small and easy to configure.