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Hello Dan,<div><br></div><div>You can use Disk Utility built into the Apple OS and select wipe the drive 35 times option.</div><div><br></div><div>Hope this helps,</div><div><br></div><div>Bruce Ryan Nakamura</div><div><br></div><div><br><div><div>On Feb 27, 2010, at 10:02 AM, dapper dan wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"> i have two older mac powerbooks and i am going to sell them.what do you recommend i do in terms of wiping clean info ie: stuff to do for security so the next person does not get valuable info i might have neglected?<br><br>thanx much<br>dan<br> <br><hr>Hotmail: Trusted email with Microsoft’s powerful SPAM protection. <a href="http://clk.atdmt.com/GBL/go/201469226/direct/01/" target="_new">Sign up now.</a><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">G4 mailing list</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="mailto:G4@listserver.themacintoshguy.com">G4@listserver.themacintoshguy.com</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="http://listserver.themacintoshguy.com/mailman/listinfo/g4">http://listserver.themacintoshguy.com/mailman/listinfo/g4</a></div> </blockquote></div><br></div></body></html>