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Can I erase my internal disk and then install O...

On screenshots of Disk Utility some external disk shown for erasing, nothing specified about internal.

I see such structure in my disk Utility:

Internal

Apple SSD - Machintosh HD

External

Apple disk image.

 

Will I be able to open Disk Utility and reinstall after erasing Machintosh HD?

Yes.

 

Install El Capitan or later from Scratch

 

     Backup if possible before continuing.

 

  1. Restart the computer. Immediately after the chime hold down the Command and R keys until the Apple logo appears. When the Utility Menu appears:
  2. Select Disk Utility from the Utility Menu and click on Continue button.
  3. When Disk Utility loads select the volume (indented entry, usually Macintosh HD) from the Device list.
  4. Click on the Erase icon in Disk Utility's main window. A panel will drop down.
  5. Set the Format type to Mac OS Extended (Journaled.)
  6. Click on the Apply button, then wait for the Done button to activate and click on it.
  7. Quit Disk Utility and return to the Utility Menu.
  8. Select Reinstall OS X and click on the Continue button.

最後更新：2017-10-08 06:45:01

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