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Once it’s completed, select the volume “Mac Installation” that was just created and click on the “Restore” tab.ĩ. It may take anywhere from 30 seconds, to 3-4 minutes. Wait for Disk Utility to finish partitioning and verifying the new volume. Confirm that the format for the new partition is “Mac OS Extended (Journaled)” and click “Apply”.ħ. For logic’s sake, change the name to “Mac Installation”. Click the new partition, which will probably be named “Macintosh HD 2”. Click the ‘plus’ box below the Volume Scheme, which will create a new partition.Ħ. The “Partitions” tab displays all the volumes, or different sections of the physical hard drive in your Mac. Once you select the disk, click the “Partitions” tab. In the left pane of Disk Utility, which displays all the drives connected to your computer, select the encompassing drive containing “Macintosh HD”.Ĥ.

Navigate to /Applications/Utilities/Disk Utility, and select that there.ģ. If Disk Utility isn’t one of the options in “Open With”, select “Other”. By default, OS X opens DMG files with “DiskImageMounter”, which allows you to view the files inside of it.

Once you have the DMG, right-click it and select “Open With”. dmg image of the Snow Leopard Installation DVDĢ. If you haven’t already done so, follow this guide to create your. Warning: Remember to back up all your files before reinstalling.ġ. Wallet-friendly Note: No need to buy anything! An existing, bootable Mac partition on your computer dmg image (essentially a carbon copy of what comes on the Snow Leopard Install DVD) Lastly, for those who don’t have an optical drive, or have a malfunctioning one, using optical media simply isn’t even an option. Personally, I’ve gone through countless DVDs just to try to successfully boot from one. They scratch often, break easily, and are prone to corruption. If using the provided Snow Leopard installation DVD, or optical media in general to reinstall OS X isn’t an option, using Disk Utility is a much faster, reliable, and compatible method of doing so.Ĭurrently, optical media (CD’s, DVD’s, etc.) are extremely fickle regarding when they choose to work.