Accidentally Deleted Startup Disk Mac M1 iMac, MacBook Pro/Air, Mac Mini

🗓️ June 27, 2022 By ✍️ Jaysukh patel

Accidentally deleted startup disk Mac 2022? When the Mac, MacBook startup disk is stocked up with documents, videos, files, etc., it may slow down the Mac, and you might receive an error message while using some programs. And upon getting these errors, some users have tried to get rid of them and accidentally deleted the mac os partition along with all the personal data. Don’t panic; if you can’t find out the data and it is deleted, this article will help you recover the accidentally erased external hard drive mac, MacBook.

Before using any third-party recovery tools, I’d urge you to try our basic workaround, which shows a way to recover accidentally deleted startup disk and restoring the Time Machine backup.

How to Recover Accidentally Deleted Startup Disk on M1 Mac, MacBook

Mac Startup Disk not showing? Make sure you’re following the right procedure to open the Start-Up disk; it is different for M1 Mac and Intel-based Mac. Here’s how to open Recovery Mode on Mac, MacBook [Apple’s Silicon M1-series, M1 Pro (MacBook Pro), M1 Max (MacBook Pro & Mac Studio), M1 ultra (Mac Studio), M2 chip of 2022 (MacBook Pro & MacBook Air) Or Intel chip Mac computer].

Method 1: Use Recovery Mode Option

On M1 Apple Silicone Mac:

  1. Shut down the Mac completely; to do so, click on the Apple menu and select Shut Down.
  2. Power On the Mac, press and hold the Power button until Startup Options appears on the screen.
  3. Click on Options and then click Continue.recovery-mode-in-m1-mac
  4. Select Disk
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On Intel Mac:

  1. Restart the Mac, click on the Apple menu, and select Restart.
  2. Immediately, press and hold the Command + R.
  3. When the Apple logo, Spinning Globe, or Startup screen appears, release the Command + R.
  4. If asked, enter the Mac Password, and then you should see the Disk Utilities screen.
  5. Select Disk Utility.

Once you’re up to that, select the Internal Hard Drive from the left pane. Click on the Partition tab in the Disk Utility. From the Partition Layout, select 1 Partition.


Keep note that the Format is shown in Mac OS X Extended (Journaled).


Select Apply and repartition the drive.

Let the process completes, and if it completes without any error, close the Disk Utility.

An extra step you have to follow if you have a backup on Time Machine External Drive. Connect and Restore your Mac Data to a Newly created Partition. or You can Directly restore Old Time Machine Backup to Mac [There are not built-in settings for “your mac has no volumes to recover”] if Anything is erased in your Partition using the Below method,

Method 2: Restore Backup from Time Machine Drive

Another alternative to bring back the accidentally erased hard drive disk utility is by Restoring Backup from Time Machine. If you keep backup on Time Machine, then it’s time to use that backup to get the deleted files back.

In M1 Apple Silicone Mac:

  1. Shut down the Mac. Click on the Apple menu > Shut Down.
  2. Now press and hold the Power button until Startup Options displays.
  3. Click on Options and then click Continue.recovery-mode-in-m1-mac
  4. Enter the password if asked.
  5. Select Restore From Time Machine Backup.restore-from-time-machine-in-recovery-mode
  6. Follow the on-screen instructions.
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Now, Your Erased or Lost mac data is reloaded from the old Backup successfully. with Apps, Games, Files, Folders, and settings as well.

On Intel Mac: [Follow for below steps for Intel Mac user]

  1. Restart the Mac.
  2. Press the Command + R until the startup screen or Apple logo or globe appears on the screen.
  3. Select Disk Utility.
  4. Click on Restore From Time Machine Backup.

From now onwards, the steps remain the same to restore time machine backup on Mac.

  1. When Restore From Time Machine Backup screen shows up, click Continue.
  2. Select the hard drive from the list of drives from where you want to restore the backup.
  3. If you’re restoring from USB Drive or Hard Drive, make sure it is connected to the Mac, or else choose Wireless Network if you’ve stored the backup there.
  4. Now find the backup that you want to restore.

Note: Apple Doesn’t give service for recover Data after loss, But they will help in Use Time Machine Backup guide explained in this article, But you can use Third-Party Software or Mac Data Recovery Software, which will not help in 100% Data recovery but some percentage as of your luck.

Jaysukh Patel
Jaysukh Patel

Jaysukh Patel is the founder of howtoisolve. Also self Professional Developer, Techno lover mainly for iPhone, iPad, iPod Touch and iOS, Jaysukh is one of responsible person in his family. Contact On: [OR]

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