Deleting files from Time Machine backups

If you are working with confidential files and you may want to make sure they are erased from your Time Machines backups when you delete them as well as your live file system. It is, fortunately, very easy to do so. Launch Time Machine, then navigate to and select the file you want to erase. Now select the Action menu and choose Delete All Backups of XYZ (where XYZ is the name of the file you are erasing).