how do I wipe my computer clean before selling it without the startup disc?

Help! I'm trying to wipe my macbook clean before selling it, but every article I found says I need the original disc that came with the computer and I don't have it. I tried holding down command+r and restarting and also tried holding down option when restarting. Neither worked!

MacBook (13-inch), Mac OS X (10.6.8)

Posted on Sep 15, 2014 5:19 PM

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how do I wipe my computer clean before selling it without the startup disc?

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