Delete an item from your backup disk
You can delete all copies of a backed-up file or folder from your Time Machine backup disk.
Note: These instructions apply only to backups stored on an external backup disk. You can’t delete items from local snapshots stored on your internal drive.
Click the Time Machine icon
in the menu bar, then choose Enter Time Machine.If the Time Machine menu isn’t in the menu bar, choose Apple menu > System Preferences, click Time Machine, then select “Show Time Machine in menu bar.”
Use the arrows and the timeline on the right side of your screen to browse the backups Time Machine created.
Select the item you want to delete, then click the Action pop-up menu
and choose Delete All Backups of [item name].
Important: Don’t use Terminal or any other app other than the Finder to move, copy, or remove items from the Backups.backupdb folder. Also, never modify or delete any items in the /.MobileBackups directory. Time Machine uses this directory to maintain local snapshots, which are deleted automatically by Time Machine when more space is required.