I am not a MAC owner but helping someone I work with. I work in the IS department of my company and this employee needs the free space of his personal PC wiped without completely blowing away his drive. I can find tools that do it, but they wipe the entire drive.
We are looking to only clean the free space, and the utility must be in accordance with DOD standard
Hi Lisa
The only product that can do this on a Mac is Micromat TechTool Pro 4;
http://www.insideapple.com/article.php?id=56_0_1_0_M
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Bobw - Macosx.com Tech Support