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OS X mavericks will not install GUID partition

482 Views 1 Reply Latest reply: Oct 24, 2013 2:45 PM by Grant Bennet-Alder RSS
cliff2255 Calculating status...
Currently Being Moderated
Oct 24, 2013 2:10 PM

At one time I had Parallels installed on this drive.


Now when I attempt to install Mavericks I get "This disk doesn't use GUID Partition Table scheme.


It tells me to go to  disk utitlity and repartition with GUID.


If I do that I lose all my programs and data.


Any other ways to install Mav and not have to do a repartition?




Mac Pro, OS X Mountain Lion (10.8.4)
  • Grant Bennet-Alder Level 8 Level 8 (48,095 points)
    Currently Being Moderated
    Oct 24, 2013 2:45 PM (in response to cliff2255)

    Drives are cheap.


    Buy another. And while you are at it, buy an external enclosure and make a current Backup or enable Time Machine before you try to move forward into a new version of Mac OS X. ¿what if it fails to Install properly?

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers


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