Click the picture below for a larger version. After the dmg is restored to the external device, change your boot disk to this device and reboot.ĭragging the source and destination files can be a little confusing.
You will lose any information you have in your external device in this process. – Drag your device from the left column to the Destination textbox – Select your external device in the left column of the utility
– In the Utilities Folder in your Applications Folder select Disk Utility – Copy your dmg file to your current apple desktop. Restore the dmg file to an external deviceĪn external hard drive or an iPod in hard disk mode will serve as an excellent booting device as well. The OS X Mountain Lion splash screen appears. Select Reinstall OS X, and click Continue. The media is expensive, but for many people this is the easiest option.īurn it and reboot to it. Boot from your Recovery HD partition by restarting your Mac while holding down the cmd+R keys. OS X is too large to fit on a single layer DVD however, many macbooks support burning dual layer DVDs. Installing OS X from a dmg file format instead of a DVD/CD format seems challenging. With leopard testing and development, many people are having troubles installing from the supplied binary. Installing OS X from a DMG file can be difficult.
