Missing Recovery Partition going from PB6 to Full Release

Discussion in 'OS X Yosemite (10.10)' started by Newfiebill, Oct 17, 2014.

  1. Newfiebill macrumors regular


    Jan 6, 2011
    Hi everyone, Happy Friday!

    It seems I am missing my 10.10 Recovery Partition going from PB6 to Full Release from MAS. Is there a way I can get it back without do a full format and reinstall?

    I tried Option/Restart and all I got for an option was the Macintosh HD.
  2. Merode macrumors 6502


    Nov 5, 2013
    Warszawa, Poland
    Did you do clean install (Erase and then install)?
  3. tywebb13 macrumors 68020

    Apr 21, 2012
    There are 2 scenarios here.

    1 - a recovery partition was created but is not available in the startup manager because core storage logical volumes were also created by the yosemite installer which is preventing the recovery partition from showing up in the startup manager. In this case the workaround which usually works (unless you have a fusion drive where much more work will be required):

    If the yosemite installation creates a core storage logical volume you can revert it to get partitions back to normal by running these 2 commands in terminal.

    diskutil cs list

    and then

    diskutil coreStorage revert lvUUID

    where lvUUID is the last lvUUID reported by the previous Terminal command.

    2 - no recovery partition was created. In this case you can create one yourself.

    To make the recovery partition:

    Download the Lion Recovery Update from http://support.apple.com/kb/dl1464. Make sure it is in your downloads folder. If you still happen to have the yosemite installer app somewhere, right click on it and click Show Package Contents. Go to Contents/SharedSupport/. Copy the InstallESD.dmg file into your Downloads folder. If you don't still have the installer, you can get it again by redownloading from your purchases tab in your mac app store.

    Download and decompress the file recovery.sh.zip from http://4unitmaths.com/recovery.sh.zip and move recovery.sh into your Downloads folder if it's not there already.

    Open Terminal and type the following commands:

    chmod +x ~/Downloads/recovery.sh

    sudo ~/Downloads/recovery.sh

    Wait a few minutes for it to finish and return back to a prompt. Reboot with holding down the option key to test your 10.10 recovery partition.

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