can't reinstall MacOs after factory reset

Hey there!

See if you can startup into Internet Recovery mode to erase your Mac, and reinstall macOS.

1. Restart your Mac.
2. Immediately press and hold Option-Command-R until you see a spinning globe.
3. If you see a lock, enter the password for your Mac.
4. If you have multiple volumes on your disk, select the volume you want to recover, then click Next.
5. If requested, choose an administrator account, click Next, enter the password for the account, then click Continue.
6. From the utilities window, select Disk Utility and click Continue.
7. Select Macintosh HD in the sidebar of Disk Utility. (If you don't see Macintosh HD, choose the top entry).
8. Click the Erase button in the toolbar, then enter the requested details:
   1. Name: Macintosh HD
   2. Format: APFS or Mac OS Extended (Journaled), as recommended by Disk Utility
9. Click Erase Volume Group. If this button isn't shown, click Erase instead.
10. When done, quit Disk Utility to return to the utilities window.
11. If you want your Mac to start up again from the volume you just you erased, select Reinstall macOS in the utilities window, then click Continue and follow the onscreen instructions.

Let us know if this works for you!

-Jack

nortonfromvictoria Said:

"can't reinstall MacOs after factory reset: My grandson gave me his old MacBook Pro from the year 2018, I followed the method from youtube to have it factory reset but wasn't able to reinstall the OS, it keeps saying it can't contact the server or error when downloading the OS."

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For future reference...

Reinstalling the macOS Anew:

The ultimate workaround would be through a new install.

Reinstalling the macOS Anew:

Try This:

1. First, Backup your Mac, then

2. Then, install your macOS Big Sur anew.

3. Finally, migrate it over from the Backup created in step 1

In Depth:

1. Back up your Mac:

Start by Creating a Time Machine Backupof my Mac. That way I could be assured that Incan recover my Mac, should I need the App back or if anything goes wrong due to the removal. So, Create a Time Machine backup of your Mac, so that you can have something to restore your Mac from, should anything go wrong with the reinstall.

2. Use a USB Bootable Installer:

Create a USB Bootable Installer for Big Sur. Delete the hard drive's partition. Then, install this macOS with. Go Here: How to Create a Bootable Installer for macOS - Apple Support.

3. Migrate and Reinstall Data and Apps:

Next migrate it over from the Time Machine Backup you created in step 1 to this new install.

No Success?…

Get this Diagnosed by Apple:

Apple might fix it free of charge, if found to be be faulty device. Set up a Genius Bar Appointment at your local Apple Store. There, it will be looked at and you'll be provided with your options.