Need to erase HD but no OS Install disc

[axisofphilippe]

I'm selling my computer and want to wipe the hard drive. I was going to boot it as an external drive by mounting it from my powerbook, and erase the HD using disk utility. Will this also erase the OS? do i NEED the OS Install disk to make this work? THanks.

 

[TwinCities Dan]

If you "erase" the HD, yes the OS will be gone...

 

[spinnerlys]

You're selling the computer without the installation DVDs?

You could delete everything you don't want to have seen and then securely empty the trash.

Finder > Trash > Finder Preferences (Command + ,) > Advanced > Empty Trash Securely.

Then a "Empty Securely" button appears in the trash window.
I think the data will be overwritten with ones and zeros.