I've already sold my Macbook and need help securely erasing it and restoring it to factory conditions. I'm not that great with tech stuff (kind of a "newbie"), so I need "layman's" instructions. However I have been googling around on how to do it and so I know a little about what to do, the gist kind of. The problem with the other instructions is that there are so many variants! i don't know which is right and which isn't. For instance, some say insert install dvd and go from there, some say insert dvd then restart, some say install dvd then restart then press some key while it's restarting (and I've seen people say different keys) and then some seem to say restart first and then insert dvd. And that's just the very first step! And also, most/all of the instructions end after the re-install is done. I'd like to know what to do after all that, to the very end, which would end with me turning off the computer for the last time. I just want to be sure I've got it back to square one like a fresh out of the box computer, with no user account or anything left on, and it won't start up at some other point for the new user because I'd accidentally went too far after the finish re-install or something. So instructions to the very last step which would be something like "finally, turn off your computer and package it up for the next person because you are done" would be perfect. Also, I'd like a very secure erase. I actually haven't put that much on my computer but still, I have the time before I have to give it to the buyer so why not. I've seen you can do like "zero" erases, and can do like once or seven or something like thirty times erase. I don't need to do a government level erase or anything but would still like it secure (and it's funny that a lot of instructions I've found say nothing at all about a zero-erase which makes me think those instructions aren't very good). My laptop is a MacBook Pro from 2009, with Snow Leopard OS X. As far as I know there aren't any other "partitions" or anything that I'm aware of on the computer (and it's always been mine, I bought it new), but with years of use I guess I can't be sure so instructions on how to check hard drive to make sure it's completely clean would be great. I have THREE install dvds - Mac OS X, Applications AND iWork. Almost no instructions tell me what to do with all three of these or specifically in what order (like, would I use the iWork dvd after the other two? And then how to end it all after I'm done installing them all? etc.). So I know it's a tall order but can anyone help me? If you give me a link to some other set of instructions please make sure it satisfies all the criteria I've given because I've already googled plenty of instructions and have ended up confused and not sure which is best. Thanks for any help!