Permanent Eraser

Even if you delete some files from your Mac Trash app, it's very likely that they can still be restored with the help of a recovery tool.

Permanent Eraser is a program that was created to prevent the recovery of deleted sensitive data by overwriting it for as many times as you like.

Once you launch the utility on your Mac, it displays a confirmation window asking you if you're sure you want to permanently erase everything from your Trash app. Personally, I think it's for the best if you configure the app's settings before clicking the OK button from the aforementioned screen.

The application lets you choose between four deletion methods, each with a certain amount of data overwrites: Simple (1x), DoE (3x), DoD (7x), and Gutmann (35x). Also, you can find within the Preferences menu an option to install a contextual plug-in. After you install it on your Mac, you will no longer need to launch Permanent Eraser to safely remove everything from the Trash app. You simply right-click over the file you wish to delete within Finder's window and select the correspondent option.

Another important advantage is the fact that the program gives you access to a comprehensive help guide. This built-in utility offers you all the information you need regarding how this app works.

Hence, it's worth installing this free app on your Mac if you care about your privacy and wish to prevent unauthorized users from accessing the data you delete from your computer.