Console Message: "kernel: Sandbox: net.conceited.Ru System Policy: deny(1) mach-priv-task-port 391"

Solution 1:

This is indeed Rubbernet as @unknowndomain mentions - I was getting a flood of messages that caused 100% CPU for syslogd, visible in Console.

Since Conceited have gone out of business, here is how to uninstall Rubbernet:

1. open the Rubbernet .plist file that was launching the daemon, which should be /Library/LaunchDaemons/net.conceited.RubbernetDaemon.plist
2. ensure Launchd doesn't restart the Rubbernet process with launchctl unload -w /Library/LaunchDaemons/net.conceited.RubbernetDaemon.plist
3. kill the Rubbernet process via Activity Monitor, or using ps aux and kill
4. remove /Library/PrivilegedHelperTools/net.conceited.RubbernetDaemon (mentioned in the plist)
5. remove the plist - rm /Library/LaunchDaemons/net.conceited.RubbernetDaemon.plist
6. remove the app - delete Rubbernet.app from /Applications

Writing this up because of the large number of "Uninstall Rubbernet" spam content sites that are promoting easy uninstall tools. It should not be this hard to remove Rubbernet.

Background: launchctl stack