If you’ve been using OS X El Capitan for a while, you might have noticed that the old option to “Secure Empty Trash” is gone from the trash can’s right-click menu. There’s a pretty good reason why, but it’s still possible to do it you don’t mind digging into the command line.
As the name suggests, “Secure Empty Trash” was always a way to delete files securely, ensuring they can’t get dug up again by data recovery software. According to Apple, it turns out that “Secure Empty Trash” doesn’t reliably work on flash storage, like an Solid-State Drive, so Apple removed the option in El Capitan. SSDs don’t store data in the same way as hard drives. As Macworld explains it, HDDs [...]