Your Mac will automatically shut down at the end of the process and restart on its own when the ROM is repaired and functional. Please do not try to shut down or manipulate your Macbook Air or Macbook Pro computer during the ROM restore process. A progress bar will then appear on your Mac screen during this recovery operation. On newer Macs, the ROM is automatically restored. If your Macbook Air or Macbook Pro computer is broadcasting three long tones, three short tones then again three long tones, it means that the EFI ROM is corrupted and your Macbook Air or Macbook Pro computer is trying to restore.
Three long beeps, three short beeps, and three long beeps on a Macbook Air or Macbook Pro computer
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