As I was installing Ubuntu 16.04 on a late 2009 iMac, the whole system froze while it was about 90%. after waiting for 15 mins, I decided to restart my computer.

Now when I turn on my computer, ubuntu doesnt fully boot. I get to the loading screen and then the screen does black.

The problem is, that during the installation process, I selected for Ubuntu to replace OSX, and as a result, I think it deleted the EFI partition required to load the Mac Startup Manager.

So now I can't hold the option key and select another disk to boot from, and hence re attempt the installation process. I feel like my Mac is bricked.

BTW my optical drive is broken, so I cant restore OSX that way either. What can I do? Any Ideas? Thanks.

  • 3
    Replace the Optical drive and proceed as normal, or try askubuntu.com/questions/162075/… – Elder Geek Sep 17 '16 at 14:53
  • thanks for that link. I managed to get to a kind of comand line interface (in a noob) by pressing escape while booting. The screen now shows "grub>". I typed "help" and got a bunch of commands Any idea how I can boot from my usb from here? – UbuntuLOver Sep 17 '16 at 15:06
  • Edit: I entered : "Exit" and it brought me to the grub bootloader. From there I can reinstall ubuntu. Lets hope it works :) – UbuntuLOver Sep 17 '16 at 15:12
  • You might just want to reinstall grub: howtoubuntu.org/… – Elder Geek Sep 17 '16 at 15:16
  • Also a possible duplicate of How to boot USB from GNU GRUB 2.02~beta2-9ubuntu1?. I don't know how EFI mode plays into this though. – David Foerster Sep 17 '16 at 15:30

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