This is the safest method to get specific older versions like 6.4.6. It requires a registered Fortinet account.

Always download security software, such as FortiClient, from official sources to avoid malware. 1. Official Fortinet Support Website

Once downloaded, follow the installation instructions to install FortiClient VPN 6.4.6 on your system.

Check this box if your company uses a non-standard port (e.g., 10443 instead of default HTTPS).

If prompted, select "VPN Only" if you are not using an EMS (Endpoint Management Server) license. Configure VPN Tunnel: Open FortiClient. Go to Remote Access . Click Configure VPN . Select SSL-VPN or IPsec VPN .

Offers both SSL VPN and IPsec VPN connectivity options.

: Log in to the Fortinet Customer Service & Support portal. Navigate to Support > Firmware Download , select FortiClient , and choose version 6.4.6 from the download list.

Read through the End User License Agreement (EULA), tick the box to accept the terms, and click . Step 3: Choose Destination Folder

Acknowledge that the free version does not include advanced technical support.

Follow the on-screen prompts and enter your macOS administrator password.

If you are a home user or an administrator with an updated FortiGate unit, it is highly recommended to skip the 6.4.6 build entirely and download the most recent, fully patched version of the FortiClient VPN standalone software directly from forticlient.com.

: Available as .deb and .rpm packages for distributions like Ubuntu, CentOS, and Red Hat. Important Security Note

If Two-Factor Authentication is active, enter the token code when prompted. Troubleshooting Common Issues in v6.4.6

Open your internet options and ensure TLS 1.2 is enabled. Alternatively, verify that your local antivirus software isn't blocking the FortiClient virtual network adapter. 2. Connection Halts at 98%

Yes, a FortiClient 6.4.6 VPN client can generally connect to a newer FortiOS gateway. However, licensing and telemetry architecture changed in FortiClient 7.0, so some advanced management features may not be compatible.