2 Replies Latest reply: Dec 19, 2012 2:36 PM by Joe Gramm
JDonS Level 1 Level 1 (15 points)

I understand I can "Clone" my iMac to an external hard drive and I can start from this external HD. What is the advantage of doing so and how do I do it?


iMac, OS X Mountain Lion, 21" iMac
  • Shootist007 Level 6 Level 6 (16,645 points)

    There is not advantage of doing it on a regular basis or at all to Run the computer.


    The advantage of having a Bootable external drive is IF your internal drive fails or get corrupted you have a way to start the computer and to do maintenance on it. and that you have a backup of your programs and files. you should also have a second external to do Time Machine back ups on.

  • Joe Gramm Level 5 Level 5 (6,315 points)

    Starting up from a clone is usually done if there is a problem starting up from the Main Drive or as a matter of trouble shooting. I'm not sure there are any advantages to the average user to boot up into the clone.


    Making a clone is simple if you have an external drive big enough to clone your entire main drive. Use either Carbon Copy Cloner or SuperDuper.