When you’ve picked how many wipes you’d like to run, click “OK,” then click “Erase” back at the initial prompt. Select the Internal storage disk in the left-hand menu. Open Disk Utility to begin the disk erasing process. The macOS Utilities menu will appear after a few minutes. Seven passes is going to take a long time, and even three passes will take at least an hour, so only use these options if you’re really, really paranoid. ERASE MAC HARD DRIVE AND REINSTALL OS X EASIEST METHOD How to wipe your mac memory and reset to default settings. Restart your Mac and hold down the following button combination: Option + Command + R The computer will begin to boot into the MacOS Recovery mode. The Pentagon is even more paranoid: they use seven passes. But three passes is what the US Department of Energy uses to securely delete their files. RELATED: You Only Need to Wipe a Disk Once to Securely Erase ItĪs we’ve discussed before, you probably only need one pass, at least with modern hard drives. The first notch to the right of “Fastest” writes over the entire drive with random data once the third notch, three times. That’s not what we want, so let’s move the slider. The first option, “Fastest,” will delete the partition but leave all files untouched. You’ll see a sliding scale with four options: Click the “Security Options” button on the bottom. Make sure you click the drive you want to securely delete: you do not want to erase some other hard drive by mistake! When you’re ready, click the “Erase” button. To create space on your PC hard drive, you can perform a few different maintenance tasks and clear unnecessary files or applications. Connect the drive you want to securely delete, then click it in the sidebar. Wiping a Mac hard drive How to clean a Windows computer hard drive.
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