how to override deleted file

how override deleted file blanks 1 dont want people use recovery software , recover them nor dont want reinstall lion.

 

lil.edward said: ↑

how override deleted file blanks 1 dont want people use recovery software , recover them nor dont want reinstall lion.

click expand...

i not know want, provide 2 solutions.
1. if want overwrite free space zeroes:
http://support.apple.com/kb/ht3680
2. if want overwrite entire disk or partition zeroes:
http://docs.info.apple.com/article.html?path=diskutility/10.5/en/duh1011.html

 

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