How do I wipe my Mac hard drive and reinstall OS?

How do I wipe my Mac hard drive and start over?

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 and reset my Mac and reinstall macOS step by step?

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 Mac but keep OS?

Click on your hard drive and select the “Erase” tab. Select “Mac OS Extended (Journaled)” from the Format pop-up menu. Type a name for your hard disk. Click “Erase.” To ensure that your data can’t be recovered, click the “Security Options” button and select a method of deletion.

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How do I wipe my Mac and install an older OS?

Here are the steps Apple describes:

  1. Start up your Mac pressing Shift-Option/Alt-Command-R.
  2. Once you see the macOS Utilities screen choose the Reinstall macOS option.
  3. Click Continue and follow the on-screen instructions.
  4. Select your startup disk and click Install.
  5. Your Mac will restart once the installation is complete.

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.

How do I restore factory settings on my MacBook air?

How to reset a MacBook Air or MacBook Pro

  1. Hold down the Command and R keys on the keyboard and turn on the Mac. …
  2. Select your language and continue.
  3. Choose Disk Utility and click Continue.
  4. Choose your startup disk (named Macintosh HD by default) from the sidebar and click the Erase button.

How do I reinstall Mac from scratch?

Enter Recovery (either by pressing Command+R on an Intel Mac or by pressing and holding the power button on a M1 Mac) A macOS Utilities window will open, on which you will see the options to Restore From Time Machine Backup, Reinstall macOS [version], Safari (or Get Help Online in older versions) and Disk Utility.

How do I boot my Mac into recovery mode?

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.

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How do I recover my Mac?

How to start Mac in Recovery Mode

  1. Click on Apple logo at the top left of the screen.
  2. Select Restart.
  3. Immediately hold down the Command and R keys until you see an Apple logo or spinning globe. …
  4. Eventually your Mac will show the Recovery Mode Utilities window with the following options:

What happens if you erase your Mac hard drive?

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.

Can you downgrade OS on Mac?

Unfortunately downgrading to an older version of macOS (or Mac OS X as it was previously known) isn’t as simple as finding the older version of the Mac operating system and reinstalling it. Once your Mac is running a newer version it won’t allow you to downgrade it that way.

Is my Mac too old to update?

Apple said that would run happily on a late 2009 or later MacBook or iMac, or a 2010 or later MacBook Air, MacBook Pro, Mac mini or Mac Pro. … This means that if your Mac is older than 2012 it won’t officially be able to run Catalina or Mojave.

Can I install older version of macOS?

The version of macOS that came with your Mac is the earliest version it can use. For example, if your Mac came with macOS Big Sur, it will not accept installation of macOS Catalina or earlier. If a macOS can’t be used on your Mac, the App Store or installer will let you know.

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