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This Item is Temporarily Unavailable.  MAC OS install

This method solves the problem when the OS version associated with your Apple account is no longer available at the App Store.

  1. Connect your Mac to an internet. (I recommend using an Ethernet cable)
  2. Start up your computer while holding CMD + R.
  3. Use Disk Utility to erase the Macintosh HD partition of your hard disk.
  4. Restart your computer while holding the following keys Option + CMD + R. Keep pressing the keys until you see a spinning globe on the screen.
  5. Now, it will download the OS.

This method will take you to a reinstall over the internet. It will install the original OS shipped with your Mac. Later it will allow you to upgrade to the latest version.



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