How to Erase Free Space on Mac?

Erase Free Space on a Mac Hard Drive to Prevent File Recovery

Launch Disk Utility , found within /Applications/Utilities/ or through Launchpad.
Connect the hard drive if its an external disk, and then select the hard drive from the left side menu.
Choose the "Erase" tab, then choose the "Erase Free Space" option.

How do I Clear up Free Space on my Mac?

Manually delete unneeded files by moving them to the Trash, then emptying the Trash.
Delete unneeded email in the Mail app .
Connect an external storage device to your Mac, then move files to that device.
Compress files so that they use less storage space.

What does Erase Mean on Mac?

Erasing the Mac” means completely wiping its internal storage, not just “personal data” or any of the more specific terms used loosely in Apple's articles.

Does Wiping Free Space Delete Files?

Free Space Only leaves your normal files intact. Entire Drive erases all of the files on the drive. IMPORTANT: this means the whole of the partition gets erased. The drive stays formatted, but all data gets erased.

What is Erase Free Space Drill?

Wiping the freespace just cleans the unused blocks on your disk. It's simply for security reasons, otherwise data rescue software can still recover the files. Imagine a disk like a kind of notebook.