How can I format the MB if I lost the setup disc?

[lyl]

Please help.
Thanks.

 

[Sun Baked]

Ask Apple for another set, use target disk mode, or buy/use the Mac OS X retail discs.

Asking Apple for another set tends to cost the least if you don't have the DVDs from another machine you can use for a target disk install.

 

[lyl]

can I download a leopard disc instead?will the validation expire?

 

[Sun Baked]

can I download a leopard disc instead?will the validation expire?

Can't answer the first question, since it is against forum rules.

There is no install keys with Leopard.

The only validation is a check to make sure the computer meets the Hardware specs for the OS.

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The System restore DVDs that put all the apps back to new-in-box install generally are 19.95 + shipping ballpark -- or free if you get a nice Apple genius at the store.

These DVDs are keyed to the machine you have, which means a couple more hoops to jump through to verify the machine with Apple to make sure the correct ones are sent.