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Could not boot from Clone

684 Views 7 Replies Latest reply: Feb 18, 2013 11:56 AM by Ralphjh RSS
Ralphjh Level 2 Level 2 (205 points)
Currently Being Moderated
Feb 17, 2013 12:22 PM

Using Carbon Copy Cloner, I cloned my hard drive to a new external Western Digital Drive. The WD drive was pre-formatted for Mac and contains Firewire 800 connectors, one of which was used to attach the drive. After cloning, I opened System Preferences and chose the WD drive as the startup disk and selected the Restart button to which the following message appeared:


You can’t change the startup disk to the selected disk.

The bless tool was unable to set the current boot disk.


What can I do to make this drive become a boot disk? I didn’t see any options in CCC that addressed this situation. The backup was done on a PPC  Mac running OS 10.5.8.

  • japamac Level 7 Level 7 (24,390 points)
    Currently Being Moderated
    Feb 17, 2013 1:33 PM (in response to Ralphjh)

    The WD drive was pre-formatted for Mac

    Open Disk Utility and select the WD drive. In the information provided about the drive, what is listed for "Partition Map"?

    If it says GUID Partition Table", that is your issue.


    A PPC Mac can only boot to a drive formatted with the Apple Partition Map (APM). Click the Partition tab in Disk Utility, select 1 (or more, if you wish) partitions, name the partition, in Options, select APM, then click OK and Apply.

    The drive will then be reformatted properly for you to clone to it again

  • japamac Level 7 Level 7 (24,390 points)
    Currently Being Moderated
    Feb 17, 2013 1:51 PM (in response to Ralphjh)



    I would download SuperDuper! and use it to create your clone.

    The free version of SuperDuper! is fine and the clones are always bootable.

    We don't have the reports of non-bootable clones with SD! like we do with CCC.

  • japamac Level 7 Level 7 (24,390 points)
    Currently Being Moderated
    Feb 18, 2013 2:49 AM (in response to Ralphjh)

    The drive is a Western Digital 2 TB My Book Studio


    We have lots of negative reports regarding those drives (the chipset of the housing is likely the issue).

    Even the "Mac Edition" doesn't behave like it should......


    These housings always behave:


    The 0 GB kit allows you to use any drive of your choosing.


    At least we know that it wasn't CCC. Sometimes CCC adds a file or fails to copy (can't recall which) and that makes for a clone that won't boot.


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