Retina EFI Update, Bootcamp and no GUID Partition

Discussion in 'MacBook Pro' started by JudgeyK, Oct 8, 2012.

  1. JudgeyK macrumors newbie

    Oct 8, 2012
    Hi Guy's,

    Just wondered if anybody could have a quick look at the below link ;

    I am have great trouble trying to install this Update, Disk Utility Reports one setup on my Hard Disks, but I purchased iPartition which reports another and says I have an EFI partition, but I cannot re-install the MAC OS as its says no GUID Partition, Not sure what has happened when BootCamp was setup is there anyway to re-enable the Dual Booting / Guid Partition thing so I can get this updates and any future updates installed without having to erase everything and start again.

    Kind Regards

  2. ibd macrumors member

    Apr 12, 2008
    Type the following in
    diskutil list[enter]
    This will display all partitions present.
    You can set up a GUID partition in disk utility, under the "partition" tab. You may have to erase your HD!
  3. JudgeyK thread starter macrumors newbie

    Oct 8, 2012
    Finally, Everything Resolved !

    Well Guy's, I am finally there, Retina EFI update installed and Partitions all back in place. If it helps anybody what I had to do was ;

    1) Purchase winClone to backup by Bootcamp Partition. I also purchased iPartitions which was a waste of time as I could not do anything with it because I couldn't get my mac to boot up from USB from their bootup disk etc, so loggin in using the same drive meant everything was disabled.

    2) Delete the BootCamp partition using Disk utiloity and move everything back onto the Macbook Partition.

    3) Verified disk and permissions were ok now that I only had the one partition back, all ok.

    4) Installed the EFI update, went through first time no problem this time.

    5) Create a FAT Partition using Disk Utility for same as Windows Bootcamp was before.

    6) Use WinClone to restore the original BootCamp Image over the top of the newly created Fat32 Partition.

    7) Delete Parallels Virtual sever and re-assign to newly created Bootcamp Partition.


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