I've a Mac Mini and I tried to reinstall Sierra yesterday.

  • I used Command + R at the log screen
  • Erased my Hard Drive
  • Click on Reinstall macOS Sierra

But when it was close to finish my internet dropped because of the rain and the reinstall failed. I tried again but nothing happened, so I restarted and now I can't access the recovery screen. My Mac boots directly to a grey folder with a question mark and the Command + R doesn't work.

What can I do now?

  • Do you by chance have access to another Mac for ~1 hr? – airsquared Dec 9 '16 at 13:10
  • Is your Internet back up? If so, try Cmd-Option-R to do a recovery. – Allan Dec 9 '16 at 13:45

Internet recovery does depend on the network - so if your network was what made the first Command+R boot work, you will need to get back to a working network.

Most Macs don't erase the local recovery HD so you wouldn't likely have "shot a gun towards your own foot" if you simply erased the Macintosh HD and you would still be able to boot to recovery locally.

Only if you repartitioned the entire physical volume would you have erased your own recovery.

As to the fix - you could make a recovery drive on another Mac that is working and has an internet connection or take your Mac to a working network and try internet recovery.

  • 1
    I moved the Mac Mimi to my home and tried using my personal network, then it was possible reinstall the macOs El Captain and after that I updated to Sierra. – Sandro Pereira Dec 10 '16 at 14:40

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