Short version: How do I stop intrusive apps from running at startup/login? I checked both libraries > StartupItems and System > StartupItems. Long version + rambling: So there is this intrusive app that I installed, and it keeps adding a folder in my Documents folder. Everytime I delete it, it comes back on startup. I thought it would be much easier to find the file responsible for starting this app on startup, but I was disappointed. But I'm betting it's not as difficult as searching the Windows registry. Anyway, it's not among the 'login' items, and I searched the main Library, and my User Library, and even the System's 'startup' folders, and found nothing. So what's the deal? Before you make any accusations, the app I'm using is Parallels, and yeah, there's probably some preference I could change to stop it from doing that, but I would like to do this manually, and learn more about how OS X works. I want to stop the app from running without my permission when I log in. (I'm stubborn, and want to show this app who's boss around here!) I'm thankful that in OS X, apps are much less intrusive than Windows ones, and they're only intrusive when I give them my password, from my experience at least. Am I right? But goodness I hate how intrusiveness followed me here from Windows. It would have been a deal breaker, had I known how many files (hidden or otherwise) it was going to scatter across my tidy Mac.