How to delete files on Mac and actually free the space

1. Move items to the Trash

Apple’s guide gives two equivalent moves: drag the item to the Trash in the Dock, or select it and press Command-Delete. Select several items with Command-click or Shift-click to delete them together. Apple’s shortcut list also includes Shift-Command-Delete to empty the Trash and Option-Shift-Command-Delete to empty it without the confirmation dialog.

Nothing has been removed yet. The file is in the Trash, still using its space, and can be returned. That is the point of the two-step design and the reason this guide does not start with a Terminal command.

2. Put back anything you regret

Open the Trash and drag an item out, or select it and choose File → Put Back, which returns it to the folder it came from. Apple documents both. Review the Trash before emptying when you have deleted in bulk; a single wrong item is easier to find now than after a restore from backup.

3. Empty the Trash, or delete one item immediately

Click Empty in the Trash window or choose Finder → Empty Trash. Apple’s storage guidance is explicit that a file’s space does not become available until you do this, which is why a Mac can feel just as full after an afternoon of deleting. For one item, Control-click it in the Trash and choose Delete Immediately; it goes without emptying everything else.

To make emptying automatic, open Finder → Settings → Advanced and select Remove items from the Trash after 30 days. Apple notes that items deleted from iCloud Drive are emptied after 30 days regardless of that setting.

4. Files that will not delete

A locked file needs unlocking first: select it, press Command-I and clear the Locked checkbox. A file an app still has open needs the app quit. A file on an external drive goes into that drive’s own Trash, which empties only while the drive is connected. The Trash guide walks through each case and the permission prompts that come with them.

5. Delete to free space, in the right order

When the goal is room rather than tidiness, delete by size. Storage settings lists large files and downloads under Documents; the large-files guide covers reviewing them, and the check-storage guide covers the categories. Empty the Trash after each round and compare the available figure.

Permanent deletion in the sense of overwriting is not offered by Finder; Apple removed Secure Empty Trash years ago because it is not meaningful on SSDs, and FileVault encryption is the supported protection. ClearDisk follows the same two-step pattern from inside the app: files you choose go to the Trash first, with undo, and permanent deletion is a separate, typed confirmation.