How to Change Hard Drives in Mac OS

Written by jedadiah casey
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Apple's Mac OS X operating system includes a powerful program called "Disk Utility" that lets you manage different aspects of the hard drives and other media connected to the computer, including USB flash drives. Disk Utility includes the ability to erase, partition and format connected drives. You can also create and restore disk image files and burn different optical image files to CDs and DVDs. You can use the Disk Utility program to change hard drives with Mac OS X by copying the contents from the source disk to the target.

Skill level:
Moderately Easy

Things you need

  • Mac OS X installation disc

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  1. 1

    Connect both hard drives to the computer. If the Mac only allows for a single internal hard drive, place the second hard drive in an external USB case temporarily.

  2. 2

    Insert the Mac OS X installation disc into the disc drive, and then restart the computer.

  3. 3

    Press and hold the "C" key immediately after the start-up chime until the computer begins to boot from the disc.

  4. 4

    Click the "Next" arrow.

  5. 5

    Click the "Utilities" menu, and then click "Disk Utility."

  6. 6

    Click the Mac's internal hard drive in the left column of the window, and then click "Restore."

  7. 7

    Drag the second hard drive from the left column to the "Destination" box, and then click "Restore" to copy the entire hard drive. When finished, the contents of the first drive are duplicated exactly to the second hard drive.

  8. 8

    Power off the Mac and replace the original hard drive with the second hard drive.

Tips and warnings

  • This process destroys any existing data on the second hard drive.

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