Originally Posted By: plantsower
I don't always know what is safe to delete and what isn't, and I always trusted the apps to make the right decision. Now I'm concerned.

You are placing your trust in a leaky vessel if you leave everything up to an app. The best rules-of-thumb are:
  • Don't delete anything unless you have a very recent backup or clone to recover from
  • If in doubt, don't delete it (unless you get a perverse pleasure out of reinstalling apps, OSs, etc.)
  • NEVER touch anything in the System Folder, a hidden folder, or anything that is owned by any user or group other than yourself.
There are Uninstaller apps that generally work pretty well and are reasonably safe to rely on, especially if the developer of the app being deleted follows all the file naming rules and guidelines — unfortunately some don't. But Uninstaller apps are no help with the kinds of files you were looking at.

If we knew what it was we were doing, it wouldn't be called research, would it?

— Albert Einstein