You can’t format/wipe a entire startup disk on Mac because Mac OS doesn’t allow any app to destroy the entire Mac OS. DoYourData Super Eraser for Mac also offers another two solutions for you to permanently erase data from startup disk (also called system hard drive, where the macOS is installed).
Solution 1: Permanently erase files/folders from Mac startup disk.
The mode "Erase Files/Folders" can help you permanently erase files and folders from startup disk. Just add files/folders from the Mac startup disk to the erasure list, then click on "Erase Now" button. All the selected files/folders will be permanently erased. This solution can help you permanently and selectively erase specific files/folders on startup disk.
Solution 2: Wipe free disk space of startup disk to wipe deleted data.
"Wipe Free Space" mode can help you securely wipe the free disk space of Mac startup disk. All the deleted data on the startup disk will be permanently erased. So, you can follow these steps to permanently erase data on startup disk using "Wipe Free Space" mode.
Step 1: Delete the files you want to erase.
Just delete the files on the startup disk which you want to permanently erase, then empty the trash bin.
Step 2: Permanently erase the deleted files.
Run DoYourData Super Eraser for Mac, choose mode "Wipe Free Space". Choose the startup disk (MacHD, Apple SSD, etc) and click on "Wipe Now" button. All the already deleted/lost data and traces on the startup disk will be permanently erased.
Erasing the free disk space of Mac startup disk to permanently erase already deleted/lost data on the startup disk drive.
With the two solutions, you can securely and permanently erase sensitive data on startup disk without destroying the Mac operating system. Just download DoYourData Super Eraser for Mac here: