How to delete a file that macOS says is in use Thereu2019s an override for files you canu2019t delete, but take care.

More good news: you can also securely delete individual files. In this article we’ll look at open source software options for securely wiping hard disks, and secure file deletion. Delete Files and ...

One reliable open-source tool for securely overwriting and thereby deleting files on a Windows system is the aptly named Eraser. The program can be downloaded for free from various sites.