How long does it take to erase Mac hard drive?

So if you have a 250 GB drive, and perform a single pass erase, it should take roughly 78.5 minutes to complete. If you perform a 35-pass erase (which is overkill for even the most important security purposes), it will take 78.5 minutes x 35 passes, which equals 2,747.5 minutes, or 45 hours and 47 minutes.

How long does it take to erase Macintosh HD?

I’d estimate anywhere from 1 to 5 hours would be the norm but it’s possible for it to take up to 12 hours. Make sure you erase everything securely before selling it so the buyer can’t recover your saved passwords. Several seconds if done properly: What to do before selling or giving away your Mac.

How long does it take to wipe a hard drive?

Calculating Time



While times will vary based on the factors listed above, a consumer grade, 20 gigabyte IDE hard drive, being wiped with a single pass of zeros being written to the drive, will take about an hour to complete.

IMPORTANT:  How many HDD Can a laptop have?

What does erasing Mac hard drive do?

Erasing your Mac permanently deletes its files. If you want to restore your Mac to factory settings, such as to prepare it for a new owner, first learn what to do before you sell, give away, or trade in your Mac.

How do I wipe my Mac hard drive completely?

How to Wipe a Mac With an M1 Chip

  1. Turn on your Mac and continue to press and hold the power button until the startup options window comes up. …
  2. When the Utilities window appears, select Disk Utility.
  3. In the sidebar, choose Macintosh HD.
  4. Click the “Erase” button, then select a file system format and enter a name for it.

How do I wipe my Mac and start fresh?

Erase and reinstall macOS

  1. Start up your computer in macOS Recovery: …
  2. In the Recovery app window, select Disk Utility, then click Continue.
  3. In Disk Utility, select the volume you want to erase in the sidebar, then click Erase in the toolbar.

How do I wipe my Macbook Pro and start over?

Go to Settings > System > Reset or System > General > Reset on 3rd gen and previous devices. 3. Select “Reset” if you just want to erase your data, and “Reset and Update” if you want to bring your Apple TV’s software up to date after you wipe it. 4.

How do I erase my hard drive fast?

By far, the easiest way to completely erase a hard drive is to use free data destruction software, sometimes called hard drive eraser software or disk wipe software.

IMPORTANT:  Can you get files back after formatting a USB flash drive?

What is the best program to wipe a hard drive?

5 Free Programs to Completely Wipe a Hard Drive

  • DBan (Darik’s Boot and Nuke)
  • KillDisk.
  • Disk Wipe.
  • Eraser.
  • HDD Low Level Format Tool.

Why does wiping a drive take so long?

Wiping a drive takes time, you have to write random data to all free space and then delete it again. Bigger disk or more passes will take more time.

Why won’t my Mac let me erase the hard drive?

It’s not usually possible to erase the startup disk because your Mac is using it to run macOS. Recovery Mode is a special partition on your Mac you can use to restore from a backup, reinstall macOS, get online support, or erase your startup disk. You should back up your Mac before trying to erase or reformat it.

Where is recovery on Mac?

Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the Internet. macOS Recovery installs different versions of macOS, depending on the key combination you use while starting up.

Information storage methods