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The link How to Replace Your MacBook Pro's Hard Drive with an SSD doesn't help me because the problem is - the drive cannot be partitioned with Disk Utility (Step 3). The Partition button is blanked out! I have read a bunch of how-to's before asking for help. Start Windows Explorer, right-click the computer's root hard disk, and then click Properties. Click the Security tab, and then click Add. In the Select Users, Computers, or Groups dialog box, click the SYSTEM account, click Add, and then click OK. Click to select the Full Control check box under Allow, and then click OK.

Disk Utility User Guide

You can restore a volume from another volume. When you restore from one volume to another volume, an exact copy of the original is created.

WARNING: When you restore one volume to another, all the files on the destination volume are erased. Before you restore a volume, copy any files on the destination volume that you want to save to a different volume.

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  1. In the Disk Utility app on your Mac, choose View > Show All Devices.

    If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon .

  2. In the sidebar, select the volume you want to restore, then click the Restore button .

    This is the volume that is erased and becomes the exact copy.

  3. Click the Restore pop-up menu, then choose the volume you want to copy.

  4. Click Restore, then click Done.

You can also use Disk Utility in macOS Recovery to restore a volume. See the Apple Support article About macOS Recovery.

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See alsoRestore a disk image to a disk using Disk Utility on MacErase and reformat a storage device in Disk Utility on MacCreate a disk image using Disk Utility on MacAdd a checksum to a disk image using Disk Utility on MacVerify that a disk image’s data isn’t corrupted using Disk Utility on Mac

Disk Utility Could Not Validate Source

Disk Utility User Guide

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You can restore a disk image to a disk. To do this, you first need to erase the disk. If the disk image has multiple partitions, you must restore each partition individually.

Restore a disk image with a single volume to a disk

  1. In the Disk Utility app on your Mac, select the volume that you want to restore in the sidebar, then click the Restore button .

    This is the volume that is erased and becomes the exact copy.

  2. Click the Restore pop-up menu, then choose the volume you want to copy.

    If you’re restoring from a disk image, click the Image button, then navigate to that disk image.

  3. Click Restore.

Restore a disk image with multiple volumes to a disk

To restore a disk image with multiple volumes to a disk, you must partition the destination disk, then restore each volume individually.

Mac Disk Utility Restore

  1. In the Finder on your Mac, double-click the disk image to open it.

    The disk image’s volumes appear as disks in the Finder.

  2. In the Disk Utility app, select the disk in the sidebar, click the Partition button , then partition the destination disk.

    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. See Partition a physical disk in Disk Utility on Mac.

  3. In the sidebar, select the volume that you want to restore, then click the Restore button .

    This is the volume that is erased and becomes the exact copy.

  4. Do one of the following:

    • Restore from a volume: Click the “Restore from” pop-up menu, then choose the volume you want to copy.

    • Restore from a disk image: Click Image, choose the disk image you want to copy, then click Open.

  5. Click Restore.

  6. Repeat steps 3–5 for each remaining partition.

Error 254 Disk Utility Mac

See alsoCreate a disk image using Disk Utility on MacAdd a checksum to a disk image using Disk Utility on MacVerify that a disk image’s data isn’t corrupted using Disk Utility on Mac