Reformat Question

forgive me if has been covered did search , couldn't find anywhere.

have mid-2009 15" macbook pro. shipped 10.5 , have since upgraded 10.6 , 10.7. since purchase, i've moved half dozen times , have lost original 10.5 os x disc (and 10.6 purchased). know, 10.7 download via mac app store.

so, in short, question - i'm preparing sell macbook pro, in order upgrade, , curious how can complete fresh reformat of hard drive before doing (remember don't have os x disc came , i've since upgraded twice).

there 30+ months of possibly private data i'd make sure doesn't passed along next owner.

also, 1 last question (somewhat unrelated). i'm not familiar timemachine, if use backup macbook can transfer backup new machine once purchase one?

in advance everyone!

- john

 

well check out macworld guide installing lion: our complete guide. using external thumb drive lion installer can use reformat drive.

 

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