Shred will allow you to free space easily. All you need to do in order to take its capabilities for a spin is drag and drop any file or folder, with the app being able to work in batch mode as well.
Price USD 0
License Free
File Size 216.68 kB
Version 1.1
Operating System Mac OS X 10.11 Mac OS X 10.9 Mac OS X 10.10 Mac OS X 10.8 Mac OS X 10.7 Macintosh macOSX (deprecated)
System Requirements Java 8