I made the mistake of trying TuneUp. I had used it before and found it helpful for cleaning up my iTunes library. I deleted the app and followed their own instructions as to how to completely delete the app (see here). Unfortunately their instructions are lacking. My system.log is flooded with the following message: com.apple.xpc.launchd (com.tuneupmedia.TuneUpHelper): Service only ran for 0 seconds. Pushing respawn out by 10 seconds. I have greped for com.tuneupmedia.TuneUpHelper in the following locations: ~/Library/LaunchAgents /Library/LaunchAgents /Library/LaunchDaemons /System/Library/LaunchAgents /System/Library/LaunchDaemons Nothing was found. When I run 'launchctl list' sure enough there is a service com.tuneupmedia.TuneUpHelper. So what on earth could be going on? How can I find out where this item is and stop it?