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Does time machine back up the OS?

5011 Views 36 Replies Latest reply: Nov 18, 2012 2:12 PM by sootshe RSS
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sootshe Level 1 Level 1 (0 points)
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Nov 13, 2012 2:38 PM

Wanting to install a new hard drive in my Mac Book Pro. Will Time Machine book up the OS on my current hard drive, so that when I do the reinstall it will boot up & operate as before, or do I need to use something like SuperDuper or Carbon Copy Cloner?

  • Kappy Level 10 Level 10 (221,015 points)
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    Nov 13, 2012 2:42 PM (in response to sootshe)

    Yes. But it does not replace CCC, it is an alternative to it.

  • Niel Level 10 Level 10 (234,580 points)
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    Nov 13, 2012 2:42 PM (in response to sootshe)

    Time Machine will back up the OS, but that backup needs to be restored before the computer can be booted from it. Those programs can create backups which are directly bootable.

     

    (71563)

  • Niel Level 10 Level 10 (234,580 points)
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    Nov 13, 2012 3:02 PM (in response to sootshe)

    They don't do the same thing. CCC and SuperDuper create one-shot bootable clones each time they're used. Time Machine creates an archiving system which stores multiple versions of the same files.

     

    (71568)

  • Niel Level 10 Level 10 (234,580 points)
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    Nov 13, 2012 3:04 PM (in response to sootshe)

    Yes.

     

    (71570)

  • Kappy Level 10 Level 10 (221,015 points)
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    Nov 13, 2012 3:10 PM (in response to sootshe)

    I did not say "do it twice." I said they are not the same. They are functionally different. However, what's wrong with two different backups. You can never have too many.

     

    CCC and other similar utilities can make directly bootable clones identical to your usual main drive. Time Machine cannot do that. Time Machine also requires more space on a backup drive - at least twice the size of  the drives you backup compared to CCC, etal.

  • Niel Level 10 Level 10 (234,580 points)
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    Nov 13, 2012 3:13 PM (in response to sootshe)

    In your case, yes. The main advantage of Time Machine is that you can quickly retrieve a specific version of a single file or folder without needing to hunt through multiple backups or restoring anything else.

     

    (71571)

  • Niel Level 10 Level 10 (234,580 points)
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    Nov 13, 2012 3:23 PM (in response to sootshe)

    You need to boot from an alternate source, such as a Mac OS X install DVD, and restore the backup from there, or install a fresh OS onto the new drive and migrate from the backup when setting it up. See the fourth set of instructions in this article for more information.

     

    (71572)

  • Niel Level 10 Level 10 (234,580 points)
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    Nov 13, 2012 3:32 PM (in response to sootshe)

    If you swap the computer's hard drive out, it needs to download a new recovery partition from Apple's servers before that will work. Otherwise, it should.

     

    (71574)

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