Fortinet Client v6.4 I tried below command and it worked well.

!/bin/bash

/Applications/FortiClientUninstaller.app/Contents/Library/LaunchServices/com.fortinet.forticlient.uninstall_helper
rm -rf /Library/Application Support/Fortinet/
rm -rf /private/var/root/Library/Preferences/com.fortinet.FortiClientAgent.plist
exit 0

Hi @saikat_tripathi 

i tried the first command from your above post on Forticlient 7.x version but i get below errors on terminal.
Can you please help here ?
Thanks

The script below will completely remove the FortiClient.app and FortiClientUninstaller.app even if they are locked. The key is to remove the immutable flags from the apps.
 

#!/bin/zsh
# uninstall_forticlient.sh
# Completely removes FortiClient VPN and all supporting components from macOS

# ─────────────────────────────────────────────
# Kill FortiClientAgent process
# ─────────────────────────────────────────────

echo "Terminating FortiClientAgent process..."
if pgrep -x "FortiClientAgent" &>/dev/null; then
    pkill -x "FortiClientAgent"
    echo "  FortiClientAgent terminated."
else
    echo "  FortiClientAgent not running. Skipping."
fi

# ─────────────────────────────────────────────
# Remove immutable flags from FortiClient app bundles
# ─────────────────────────────────────────────

echo "Removing immutable flags from FortiClient app bundles..."

declare -a fortiAppBundles=(
    "/Applications/FortiClient.app"
    "/Applications/FortiClientUninstaller.app"
)

for appBundle in "${fortiAppBundles[@]}"; do
    if [[ -e "$appBundle" ]]; then
        chflags -R nouchg,noschg "$appBundle" && \
            echo "  Immutable flags cleared on $appBundle." || \
            echo "  Failed to clear immutable flags on $appBundle."
    else
        echo "  $appBundle not found. Skipping flag removal."
    fi
done

# ─────────────────────────────────────────────
# Unload LaunchDaemons
# ─────────────────────────────────────────────

echo "Unloading FortiClient LaunchDaemons..."

declare -a fortiLaunchDaemons=(
    "/Library/LaunchDaemons/com.fortinet.forticlient.vpn.plist"
    "/Library/LaunchDaemons/com.fortinet.forticlient.fsssoagent_launchdaemon.plist"
    "/Library/LaunchDaemons/com.fortinet.forticlient.epctrl.plist"
)

for daemonPlist in "${fortiLaunchDaemons[@]}"; do
    if [[ -f "$daemonPlist" ]]; then
        daemonLabel=$(defaults read "$daemonPlist" Label 2>/dev/null)
        if [[ -n "$daemonLabel" ]]; then
            echo "  Stopping and unloading: $daemonLabel"
            launchctl bootout system "$daemonPlist" 2>/dev/null && \
                echo "  Successfully unloaded $daemonLabel." || \
                echo "  Could not unload $daemonLabel (may not be loaded)."
        else
            echo "  Could not read label from $daemonPlist. Skipping unload."
        fi
    else
        echo "  $daemonPlist not found. Skipping."
    fi
done

# ─────────────────────────────────────────────
# Remove application bundles
# ─────────────────────────────────────────────

echo "Removing FortiClient application bundles..."

for appBundle in "${fortiAppBundles[@]}"; do
    if [[ -e "$appBundle" ]]; then
        echo "  Removing: $appBundle"
        rm -Rf "$appBundle" && echo "  Removed." || echo "  Failed to remove $appBundle."
    else
        echo "  $appBundle not found. Skipping."
    fi
done

# ─────────────────────────────────────────────
# Kill FortiTray and FortiClientNetwork processes
# ─────────────────────────────────────────────

echo "Terminating remaining FortiClient processes..."

declare -a fortiRemainingProcesses=(
    "FortiTray"
    "FortiClientNetwork"
)

for processName in "${fortiRemainingProcesses[@]}"; do
    if pgrep -x "$processName" &>/dev/null; then
        pkill -x "$processName"
        echo "  $processName terminated."
    else
        echo "  $processName not running. Skipping."
    fi
done

# ─────────────────────────────────────────────
# Remove system-level support files
# ─────────────────────────────────────────────

echo "Removing system-level FortiClient support files..."

declare -a fortiSystemPaths=(
    "/Library/Application Support/Fortinet"
    "/Library/Internet Plug-Ins/FortiClient_SSLVPN_Plugin.bundle"
    "/Library/LaunchDaemons/com.fortinet.forticlient.vpn.plist"
    "/Library/LaunchDaemons/com.fortinet.forticlient.fsssoagent_launchdaemon.plist"
    "/Library/LaunchDaemons/com.fortinet.forticlient.epctrl.plist"
)

for systemPath in "${fortiSystemPaths[@]}"; do
    if [[ -e "$systemPath" ]]; then
        echo "  Removing: $systemPath"
        rm -Rf "$systemPath" && echo "  Removed." || echo "  Failed to remove $systemPath."
    else
        echo "  $systemPath not found. Skipping."
    fi
done

# ─────────────────────────────────────────────
# Remove per-user FortiClient data
# ─────────────────────────────────────────────

echo "Removing per-user FortiClient support files..."

localAccounts=$(dscl . list /Users UniqueID | awk '$2 > 500 {print $1}')

for userName in $localAccounts; do
    userFortiPath="/Users/${userName}/Library/Application Support/Fortinet"
    if [[ -d "$userFortiPath" ]]; then
        echo "  Removing FortiClient data for user: $userName"
        rm -Rf "$userFortiPath" && echo "  Removed." || echo "  Failed to remove $userFortiPath."
    else
        echo "  No FortiClient data found for user: $userName. Skipping."
    fi
done

echo ""
echo "FortiClient removal complete."