DFU Restore

Part 1 of 2

The error message " error -2005F " seems to indicate a Lack of a Working Internet Connection

Revive or restore an Intel-based Mac using Apple Configurator

Excerpt from above

• Internet access
• You may need to configure your web proxy or firewall ports to allow all network traffic from Apple devices to Apple’s network 17.0.0.0/8. For more information on the ports used by Apple products, see the Apple Support article Use Apple products on enterprise networks. For more information on whether your network uses a web proxy or firewall, consult your router manual or your internet provider.
• A supported USB-C to USB-C charge cable, such as the one sold by Apple (may not be available in all countries or regions) or a supported USB-A to USB-C cable
• The USB-C cable must support both power and data. Thunderbolt 3 cables aren’t supported.

Part 2 of 2

This method will WIPE ALL Data and there is No DATA Recovery - Period.

>> Only works on Intel Based Apple Computer <<

To perform this action will require booting from a Bootable Installer. 

The Bootable Installer can Only be performed on an Apple Computer 

This will have to be performed from a Qualifying Computer to run the version of macOS to be made on the Bootable Installer.

Example : Bootable Installer of Big Sur would have to be done on a computer that Qualifies to run Big Sur.

Notation: If the computer being used to perform this action is Too New or Too Old to qualify to run the version of macOS - this computer can’t be used.

Alternative is, to gain access to a Qualifying Apple Computer from a family member, friend or associate.

Extra Special Notation regarding the Touch ID equipped Apple Computer.

 About Startup Security Utility and Must Enable from Recovery Mode the ability to boot from External Drive Before Attempting 

Shutdown computer and disconnect all external drive Except the newly created Bootable Installer.

Restart and immediately hold the OPTION key until the Startup Manager appears and choose the USB Drive. 

It will present options >> Disk Utilities >> View >> View ALL attached Drives. 

Choose the Upper Most Drive ( not the volumes indented and list below ).

The drive normally is called Apple Media or Apple SSD - that is the drive to Erase and format as APFS with the GUID Partition Map. This applies to macOS 10.14 Mojave and above. 

Formatting for macOS 10.13 High Sierra and below requires HFS Journaled with the GUID Partition Map

Once that is done >> backup out of Disk Utilities and choose install macOS. 

Follow the prompts and it may automatically reboot several time. 

Upon a final reboot - Setup Assist will present with the newer version of macOS.

You can use Setup Asset and point it to the Time Machine Backup Drive. This is a One Time offer. Thereafter you will need to use Migration Assist 

A MacBook Air with Touch ID and T2 Secure Enclave chip

You would have Had to have Changed to Setting Before you Wiped the Drive

As it stands now - you have an Expensive Paper Weight that Can Not Boot for a Bootable Installer Drive

I can not tell you how much it will cost

Only they can give you an accurate figure how much it will cost you

Have the computer evaluated by the Professionals who have the Special Hardware Software and Expertise to diagnose the issue and offer possible solutions

Make an Appointment at the Apple Genius Bar

Call 1 800 MyApple and have them evaluate the computer

For All other locations

 Contact Apple for support and service

sharukhislam wrote:

I have revived and then restored now there is no os on the Hard Drive internet recovery works on my MacBook Pro 2015 but on my air does not ends up with that error on ethernet also on wifi. I have a usb installer of sanoma but the firmware on air has security enabled for the external drives how do i remove it. When i attach the usb installer the apple bootmenu takes me to internet recovery to connect a wifi it does not boot from the USB drive

Is I understand from above correctly you are presented with is like in image like below ?

Set a firmware password on your Mac

Set a firmware password on your Mac

If you forgot your firmware password

If you can't remember your firmware password, schedule an in-person service appointment with an Apple Store or Apple Authorized Service Provider. Bring your Mac to the appointment, and bring your original receipt or invoice as proof of purchase.