I recently pulled my old MacBooks 2009 out of the closet. Not sure what the exact model is, but anyways, a few years ago I spilled water on the keyboard, so most of the keys don't work anymore. (Sadly the special keys don't work either, like option, command, and control.) Before I stopped using it, I wiped the internal drive, for security purposes.

But now I need OS X for certain work I am doing (Objective C programming for a large scale project,etc). I have the DMG file, which I had on a backup, for OS X El Capitan. I used my Ubuntu machine to convert the DMG to an ISO, and then put then burnt OS X on to a USB. I plugged it in to the macbook, started it up, held down the option key (on an external keyboard) and it didn't work. Any idea on how to fix this would be highly appreciated!

  • External USB, not Bluetooth? Are you sure the option key you held down is the Apple option key. If your keyboard is an old Dell, or similar you might need to hold down Ctrl instead to get the bootup chooser running. – Wayfaring Stranger Dec 2 '17 at 0:52
  • DMG of what exactly? Is it an installer of some sort? I'm confused as to where this came from, as AFAIK, no bootable image for macOS is distributed in a DMG. – JMY1000 Dec 2 '17 at 1:10
  • The terminal utility for making OS X install mediums allows you to create a DMG. – user266250 Dec 2 '17 at 1:22
  • Was the external keyboard an Apple keyboard or a PC keyboard? I believe there is a difference with respect to the option key. – David Anderson Dec 2 '17 at 3:07
  • @david-anderson, it was a a typical PC keyboard, num pad, etc – user266250 Dec 2 '17 at 5:42

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