Click on the Erase tab in Disk Utilitys main window.

If you want your Mac to start up again from the volume you just you erased, select Reinstall macOS in the utilities window, then click Continue and follow the onscreen instructions. In Mac OS X, Disk Utility is a multipurpose program for working with hard disks, disk images, CDs.

When done, quit Disk Utility to return to the utilities window.

Optional: If you previously used Disk Utility to add internal volumes other than Macintosh HD, you can erase them individually using the same process.

If you cant find one, consult the user manual. If this button isn't shown, click Erase instead. When Disk Utility launches, select the drive from the disks and volumes listed at the left side of the Disk Utility window. Look for a secure erase option under a tools or storage menu.

Format: APFS or Mac OS Extended (Journaled), as recommended by Disk Utility Note: Reformatting the drive will erase all data on the drive, so you should copy any data you want off the drive prior to formatting.

Since you are wiping your Mac entirely, you. The left-side menu will show all the drives on your Mac. Click the Erase button in the toolbar, then enter the requested details: Step 3: Choose View on the top menu bar to see all your drives, and select Show All Devices.Select Macintosh HD in the sidebar of Disk Utility.Erasing a storage device deletes everything on it.

From the utilities window, select Disk Utility and click Continue. In Disk Utility on Mac, you can erase and reformat storage devices to use with your Mac.

If asked, select a user you know the password for, then enter their administrator password.

Start up from macOS Recovery: Turn on your Mac, then immediately press and hold these two keys until you see an Apple logo or other image: Command (⌘) and R.

Disk utility erase