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You will need to start the iMac from the Mac OS X installation disc. Insert the disc, restart the computer and hold down the C key while it starts up.

From the Mac OS X installation options you can choose to Erase and install which will wipe your hard drive and install a fresh copy of Mac OS X.

If you choose Archive and Install it will create a new System and put the old system files in a folder called Previous system. It will not wipe the entire hard disc.

If you use the Erase option remember that you will lose everything so keep a back up copy of anything you may want to keep.

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Q: How can you wipe your iMac G5 hard drive to have a clean installment?
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