Mirroring display on external monitor while reformating

Discussion in 'MacBook Pro' started by effahmed, Feb 9, 2017.

  1. effahmed macrumors newbie

    Joined:
    Feb 9, 2017
    #1
    I am having an awkward problem with my MBPro which i'll try to explain as succinctly as I can:

    • The screen of my MBPro (Early 2011) cracked, leaving me unable to see whatever was happening on the screen (photo below). I plugged in a Toshiba external monitor via HDMI cable and mirrored the display. This way I could see the screen of my MBPro.
    • When my new MBPro arrived, I had the clever idea (sarcasm) to reformat the old MBPro to get a 'clean slate'. I created a backup of Sierra on an external HD and reformatted the machine using CMD+R command (external monitor setup was working fine till this point)
    • Once the reformat was done, I booted the machine pressing Option key to reinstall Sierra but I was not able to get a display on the external monitor. I've tried plugging/unplugging the HDMI cable and CMD+F1 but without any success.

    I would like to be able to get the display back on the external monitor so I can finish the reinstall. Any advice on how to do this would be appreciated!

    Thanks.

    [​IMG]
     
  2. rutrack macrumors member

    Joined:
    Jan 5, 2017
    #2
    Maybe you could connect external keyboard and mouse and run your laptop in clamshell mode ?
     
  3. ZapNZs macrumors 68020

    ZapNZs

    Joined:
    Jan 23, 2017
    #3
    IIRC, with my 2011 MBP, when using an external it would NOT show an image on the external until after the initial EFI sequence...

    But I have an idea if all else fails... (I have my moments here and there)

    You can remove the HDD or SSD from the 2011, throw it into a SATA-USB-3 enclosure, plug it into your new Mac, format the hard drive, and then install OS X onto the external (then pop it back into the 2011, boot it with the monitor connected, and then continue setting it up.) It's a little more work but shouldn't be too bad. :)
     

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