Originally Posted by pcsx2006
Yes, you can do it under Mac OS X with Disk Utility.
Open Disk Utility, select your disk on the left and then click on Erase.
Under erase, click on security options which will give four options.
I believe that, for the simple avoid of misleading data not security purposes, the option "Zero Out Data" is good enough.
This method is somewhat similar to the one using Linux but, in this case, you don't have to deal with the text mode.
It's simpler, with a few mouse clicks you are good to go.
The inconvenient is that Disk Utility will write a file system after the zeroing option chosen is completed.
The other method, under Linux, it just do the zeroing on the target media and nothing else.
As i said before, zeroing a disk means no
data recovery after the procedure completion.
So, bear this advice in mind before doing this.