Why Can’T I Erase My Mac Disk?

Can I erase Macintosh HD data?

Use Disk Utility to erase your Mac Select Macintosh HD in the sidebar of Disk Utility.

Don’t see Macintosh HD.

Click the Erase button in the toolbar, then enter the requested details: Name: Macintosh HD..

What happens if you delete Macintosh HD?

You won’t lose your own files, or apps that you might have installed. … This reinstall just copies a fresh set of your operating system files. Then, restarts, finishes the install with those downloaded files. The install process might take more than 30 minutes, but you should boot back into your hard drive, no harm done.

How do I restore my Mac Air to factory settings?

How to reset a MacBook Air or MacBook ProHold down the Command and R keys on the keyboard and turn on the Mac. … Select your language and continue.Choose Disk Utility and click continue.Choose your startup disk (named Macintosh HD by default) from the sidebar and click the Erase button.More items…•May 5, 2020

How do I factory reset my MacBook Pro 2020?

Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. Release the keys after about 20 seconds.

How do I restore my MacBook Air 2011 to factory settings?

Boot from the Recovery HD by restarting the computer and after the chime press and hold down the COMMAND and “R” keys until the computer starts from the Recovery HD. Select Disk Utility from the main menu and click on the Continue button.

How do I force my Mac to erase?

How to Wipe a Mac Hard Disk Drive (HDD)Make sure your Mac is turned off.Press the power button.Immediately hold down the command and R keys.Wait until the Apple logo appears.Select “Disk Utility” from the OS X Utilities list. … Select the disk you’d like to erase by clicking on it in the sidebar.More items…•May 29, 2018

How do you clear a full disk on a Mac?

1. Clear system storage on MacSearch for large ZIP/RAR archives in Downloads.Open your Desktop (Command + F3) and delete screenshots.In Applications, sort your apps by size. Delete the largest ones.Get rid of system junk files with a free version of CleanMyMac X.Restart your Mac to free up RAM.Jul 31, 2015

Why can’t I erase my Mac?

If you’re trying to reformat or erase the startup disk on your Mac, you need to boot into Recovery Mode first. The startup disk is the main hard drive on your computer: the one that stores macOS and all your data. It’s not usually possible to erase the startup disk because your Mac is using it to run macOS.