准备放部iMac, 想问点样清机..

准备放部iMac , 想问点样清机最安全?
要肯定无晒data..thx!

For Apple's support menu:

Steps for zeroing data

These steps assume you have a Mac OS X 10.2.3 or later CD:

    1. Insert the Mac OS X CD.
    2. Restart the computer.
    3. Immediately after the startup sound, press and hold the "C" key to start up from CD.
    4. When the Installer screen appears, do not click Continue. Instead, choose Installer > Open Disk Utilities.
    5. Select the hard drive to erase.
    6. Click the Erase tab.
    7. Select the volume format from the Volume Format pop-up menu.
    8. Click Options.
    9. Select the checkbox for "Zero all data".
    10. Click OK.
    11. Click Erase.