Here is the fix from Sonicwall
Article Applies To:
Affected SonicWALL Security Appliance Platforms:
Gen5: NSA E7500, NSA E6500, NSA E5500, NSA 5000, NSA 4500, NSA 3500, NSA 2400, NSA 240
TZ series: TZ 100, TZ 100 Wireless, TZ 200, TZ 200 W, TZ 210, TZ 210 W
SonicWALL SSL-VPN Appliances and Software: SSL-VPN 200, SSL-VPN 2000, SSL-VPN 4000
Firmware/Software Version: 3.5.
Services: NetExtender Version 3.5.634and below
Problem Definition:
Running NetExtender Version 3.5.634 on Mac OSX 10.6 Snow Leopard might give the following error:
"FATAL: Pppd is not setuid-root and the invoking user is not root."
Resolution or Workaround:
Please run the below command in the Terminal. This command will enable the "setuid" flag on PPPD, as it was in versions of OS X prior to Snow Leopard.
sudo chmod u+s /usr/sbin/pppd
After running that command, NetExtender should work properly.
SonicWALL is working on an updated NetExtender version which will resolve this issue automatically.