"An update session is in progress..." appears when downloading Security for Mac (TMSM) installer in OfficeScan (OSCE)

The message appears when OfficeScan is busy checking for possible updates. To successfully install the plug-ins, temporarily disable the OfficeScan updates.

1. Disable the server scheduled update.
   1. Log on to the OfficeScan server management console.
   2. Go to Updates > Server > Scheduled Update.
   3. Deselect the Enable Scheduled Update option.
   4. Click Save.
2. Disable Smart Protection Update.
   1. On the OfficeScan server management console, go to Administration > Smart Protection > Integrated Server.
      For OfficeScan 10.6 and below, go to Smart Protection > Integrated Server.
   2. Deselect the Enable Scheduled Updates option.
   3. Click Save.
3. Restart the following services:
   • OfficeScan Master Service
   • OfficeScan Plug-in Manager Service

   At this point, OfficeScan server should be downloading Trend Micro Security for Mac installer from the update source.

4. Go back to the Plug-in Manager page and download the installer for Trend Micro Security for Mac.
5. Once download is complete, restore configured update settings.