Mac OS X (10.6) - Application Compatibility Issues

This document provides additional information about possible application compatibility issues with Apple's operating system, Snow Leopard.

List of community-maintained issues

Click the link below to be taken to a 3rd party website containing, in alphabetical order, known applications compatibilities with Apple OSX 10.6 (Snow Leopard).

Specific known issues

The following issues have been found by internal testing:

Cisco VPN Client (

  • Problem: If the Cisco VPN Client was installed and an upgrade installation of Snow Leopard was performed, you may encounter an error "Error 51: Unable to communicate with the VPN subsystem. Please make sure that you have at least one network interface that is currently active and has an IP address and start this application again."

    Note: You may be able to re-enable the VPN subsystem by running the following command in Terminal (require Administrator access) : sudo kextload /System/Library/Extensions/CiscoVPN.kext

  • Solution: Try disabling/reenabling airport. Otherwise, you may need to uninstall Cisco VPN Client, and then download and install it again. Alternatively, you can try a newer VPN client. See Document 12534 is unavailable at this time. for more information.

Norton AntiVirus Corporate Edition 11

  • Problem: The Auto Protect feature in Norton will not turn on and will display error message windows on boot.

  • Solution: As of Norton AntiVirus 11.0.3, the Auto Protect feature will work in Snow Leopard. To update to 11.0.3, run Live Update or download Norton AntiVirus 11.0.3 from Note: Version O of the Security Starter CD provided by the TechStore and by the DoIT Help Desk does not contain Norton AntiVirus 11. Version O of the Security Starter CD contains Symantec AntiVirus 10 which is incompatible with Snow Leopard. Snow Leopard users will need to download Norton AntiVirus 11 instead of using the Security Starter CDs.

Keywords:snow leopard app compatibility   Doc ID:12055
Owner:Jeff W.Group:DoIT Help Desk
Created:2009-08-27 18:00 CSTUpdated:2015-10-01 08:49 CST
Sites:DoIT Help Desk, DoIT Tech Store
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