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NAC Agent 4.8 Uninstall / Downgrade

I need to uninstall the 4.8 NAC agent from a Mac running OS X 10.6 so I can downgrade to the 4.7.3 agent for testing.  When I follow the instructions in the documentation for components to delete in order to uninstall the client, then I reboot and start the 4.7.3 install, when I get to the "Select a Destination" screen there's a yellow triangle with an exclamation mark on the disk and a message "Cisco Clean Access can't be installed on this disk. A newer version of this software already exists on this disk."  Here are the things I've done to uninstall the agent, which resulted in the same outcome:

-- Show hidden files

-- Per documentation, delete the application from the Applications folder

-- Per documentation, look in the /Library/Receipts folder for a receipt in the CCAAgent.pkg file, which I do not see there.  The only CCAAgent.pkg file I can find is the one I'm doing the installation from, which is in the user Documents folder

-- Delete /<user>/Library/Application Support/Cisco Systems and subfolders

-- Edit /Library/Receipts/InstallHistory.plist to remove entry about CCA Agent

I can't think of anything else to do or look for.  Any suggestions?

John Meggers

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