
Repeat steps 3–5 for each remaining partition. Restore from a disk image: Click Image, choose the disk image you want to copy, then click Open. Restore from a volume: Click the “Restore from” pop-up menu, then choose the volume you want to copy. This is the volume that is erased and becomes the exact copy. In the sidebar, select the volume that you want to restore, then click the Restore button. See Partition a physical disk in Disk Utility on Mac. The destination disk must have as many partitions as the disk image, and each of the disk’s partitions must be at least as large as the corresponding partition in the disk image. Go to Applications > Utilities and launch Disk Utility. If redownloading doesn’t work, and the disk image mounter on your Mac doesn’t work, you should use Disk Utility to verify the image. It may be that something happened during the download and corrupted the file. In the Disk Utility app, select the disk in the sidebar, click the Partition button, then partition the destination disk. The first step is to try re-downloading the disk image if you can. The disk image’s volumes appear as disks in the Finder. In the Finder on your Mac, double-click the disk image to open it. To restore a disk image with multiple volumes to a disk, you must partition the destination disk, then restore each volume individually.
