My Mac has broken and I want to sell it for parts. How can I be sure that my personal data that is/was on the hard drive is safe?

My 2006 MacBook Pro has broken. There is a little bit of drive noise when I turn it on, but then nothing happens. It is no big deal. Most of my files were backed up. There are a few files I would like to recover if possible, but nothing worth a major effort.
I have seen that broken MacBook Pro's go for about $300 on eBay for parts, so I would like to sell the MacBook Pro. However, I only want to do that after I am sure that my personal data is wiped out. Does anyone know how I can accomplish that? Does anyone know of an easy way to search the old hard drive for some of the data that I lost? Can a Genius Bar take care of this stuff for me (and how much do they charge?)?
Thank you for your help.
- Eric

EricNY wrote:
I only want to do that after I am sure that my personal data is wiped out. Does anyone know how I can accomplish that?
The ONLY real secure way to be sure that noone may recover data from your drive is, to remove the drive, and drill one or two 1" holes thru the disk.
A bit less secure but useful way is, to wipe out the data with a tool that's overwrite all sectors of the drive with randomized data in multiple runs.
For example: Permanent Ereaser http://www.edenwaith.com/products/permanent%20eraser/
Independent tests bring out, that even specialized recovery companies with forensic tools are unable to find useful data after such a run.
EricNY wrote:
Does anyone know of an easy way to search the old hard drive for some of the data that I lost?
There are some recovery tools out there to fit your needs, e.g. MacKeeper http://mackeeper.zeobit.com/mac-data-recovery
Lupunus

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