ShredIt explained

ShredIt is designed to securely erase files in a variety of ways, using various overwriting patterns. Originally released in 1998, Shredit is capable of erasing files on Mac OS 7 through Mac OS 10.8 and later, as well as Microsoft Windows 95 through Windows 7^{[2] [3] [4] [5]} and later and iOS(sublicensed by Burningthumb Software).^[6] Versions of ShredIt are available for 10.6 and later through the macOS App Store, earlier and alternate versions are available through the Mireth website.

Features

• Safeplace
• Shredding by file, by folder or optical media

Overwriting Standards

• DoD 5220 Clear & DoD 5220 Sanitize
• DoE Secure Deletion^[7]
• Gutmann 35 Way Overwrite^[8]
• CD-RW Erasure

Notes and References

1. Web site: Shredit System Requirements.
2. Web site: Mireth technology Updates Shredit X for Lion - Version 6 Released.. Daily App Show. 7 September 2012. Jerad Hill. 23 August 2011.
3. Book: Reinhold, Arnold. Switching to a Mac For Dummies. 2009. John Wiley & Sons. 9780470466612. Bonus Chapter 7.
4. Book: Wang, Wallace. Steal This Computer Book 4.0: What They Won't Tell You about the Internet. 2006. No Starch Press. 9781593271053. 318.
5. Book: Marcella, Albert. Cyber Forensics: A Field Manual for Collecting, Examining, and Preserving Evidence of Computer Crimes. 2007. CRC Press. 9780849383281. Doug Menendez . 96.
6. Web site: App Store - Shredit HD. Apple Inc.. 7 September 2012.
7. Web site: Why A little Paranois Is Good For Security, And A Mac App That Permenetly Deletes Files. 7 September 2012.
8. News: Fitzgerald. Thomas. Deleted but Not Gone. 23 September 2012. The New York Times. November 3, 2005.