MAC OS X Users Suddenly Cannot Connect to SSL VPN w/SonicWALL Mobile Connect app

Hi:

I have a TZ 205 running SonicOS Enhanced 5.9.1.7-2o. “All of a sudden” in the past couple of weeks my users w/MAC OS X machines using the SonicWALL Mobile Connect app to connect to the SSL VPN are having issues. It states something about verifying connection then fails. I think the Mobile Connect app may have updated on their MACs to version 5.0.0 though I cannot confirm this is the issue/cause. I’ve had them remove/re-add the connection profile to no avail. Any ideas?

Thank you!
Bob H.