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