Reinstall MacOS

Hello. I recently had to uninstall my macOS (Monterey) and I’ve successfully got it booted into a flash drive using another Mac and was in the process of trying to reinstall it then I got hit with the “the disk doesn’t use the GUID partition table scheme”. So I followed the instructions and went into the disk utility and changed my flash drive to that but it obviously deleted the MacOS. Do I just go back to the other Mac and boot it again? Or what’s my options?

MacBook Air

Posted on Sep 11, 2022 12:54 AM

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Posted on Sep 11, 2022 03:11 AM

Go to your other mac

Insert the usb drive

Go to Disk Utility and partition it this way: MacOs journaled (extended)


Follow the instructions to make a bootable usb again

How to create a bootable installer for macOS - Apple Support


Go to your Mac you want to reinstall.

Press option to boot from the usb

Follow the Monterey installer

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Question marked as Top-ranking reply

Sep 11, 2022 03:11 AM in response to rasheed268

Go to your other mac

Insert the usb drive

Go to Disk Utility and partition it this way: MacOs journaled (extended)


Follow the instructions to make a bootable usb again

How to create a bootable installer for macOS - Apple Support


Go to your Mac you want to reinstall.

Press option to boot from the usb

Follow the Monterey installer

Sep 11, 2022 05:11 AM in response to rasheed268

Use macOS Recovery on a Mac with Apple silicon


Copy and paste portion of the information for above link


It implies the Erase All Content and Setting was perform while already booting into the existing Installation of of Monterey


Then to Bootable Installer becomes irrelevant to the Re-Installation process IMHO



Erase and reinstall macOS

If you erase and reinstall macOS, your user accounts, network settings, and all of the files and folders on your Mac are deleted. Before you erase macOS, attempt to log back in to your system, then back up any files you want to keep by copying them to another storage device. Also, write down your network settings from Network preferences to make it easier to get connected again after reinstalling macOS.

  1. Make sure you’re connected to the internet.
  2. In the Recovery app, click Disk Utility, then click Continue.
  3. In Disk Utility, select the volume you want to erase in the sidebar, then click the Erase button in the toolbar.
  4. Type a name for the volume in the Name field.
  5. Click the Format pop-up menu, choose APFS, then click Erase Volume Group.
  6. When the erase process is complete, click Done, then choose Disk Utility > Quit Disk Utility.
  7. In the Recovery app, click Reinstall macOS Monterey, click Continue, then follow the onscreen instructions.



Sep 11, 2022 04:21 AM in response to rasheed268

Q - " Hello. I recently had to uninstall my macOS (Monterey) "


A - Exactly how was this achieved ? Details on the exact method and exact Model of MBA ? MBA Apple Silicon of MBA Intel Computer.


A - The request for type of Computer is very important as Apple Silicon method of reinstalling from a Wiped Drive is different from an Intel Based MBA

Sep 11, 2022 07:12 AM in response to rasheed268

So I followed the instructions and went into the disk utility and changed my flash drive to that but it obviously deleted the MacOS. Do I just go back to the other Mac and boot it again? Or what’s my options?

It wasn’t the flash drive that was wrong, it was the drive where you were trying to install the OS.

Yes, do it again, but format the internal drive, not the flash drive.

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Reinstall MacOS

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