MacAppStuff Shredder will securely erase files, meaning that if they are ever recovered (by specialist software) their content will be useless. For added security, data can be overwritten up to 35 times and the name and date of the file/folder changed to random values.
Both files and folders can be added to the list to be shredded. Files will have their content overwritten and then the file will be deleted.
Any folders in the list will be searched and any files residing in them will be shredded. The folder will then be deleted.
If you choose to randomly rename and re-date files/folders, this will occur just prior to deletion. These two options are for added security. This ensures that it is impossible to categorise/understand any 'deleted' files/folders which may later be recovered. Dates are changed to random values over 200 years from the current date of your computer.