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I have OS backup .dmg installation file. The problem is I have Windows 7 on my MacBook Air, and I do not have access to OS X to use Disk Utility to burn/restore the OS X image.

Is it possible to burn/restore .dmg file on usb stick from Windows?

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You dont need accessing it from windows.

Boot the computer holding the [option] key and choose the OSX recovery. Inside it there you'll have a very basic osx with its own Disk Utility to restore your DMG image to another USB.

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Several programs that support opening DMG files:

7-Zip will let you unzip the files. You can rebuild and burn an ISO image from there. http://sourceforge.net/projects/sevenzip/

A search around the web brought up TransMac as being able to directly burn a DMG to disk: http://www.asy.com/sharetm.htm

Same goes for UltraISO: http://www.ezbsystems.com/ultraiso/download.htm

... but I've not tried them.

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  • But I do not want to burn on a disk. I would like to put it on my USB stick. Oct 26, 2012 at 22:49
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    TransMac will allow you to create a bootable USB: USB Drive >> Format Disk >> Format with Disk Image, then select your DMG file. You can do it with the 15-day trial. Oct 26, 2012 at 23:24
  • It does found he drive when I restart my Mac, but it cannot load the installation. It says "Your computer needs to be restared.." What could be the issue? Oct 27, 2012 at 15:02
  • Not sure. Give Rostol's solution a shot, I forgot about that little trick and it is a better suggestion then mine. Oct 29, 2012 at 4:44

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