1. iMore Question's Avatar
    Got impatient when turning on file vault after Yosemite installation now machine just has circle with line in it and won't boot up. I have a backup on external drive but holding down option key doesn't show my external drive
    03-13-2015 04:15 AM
  2. Just_Me_D's Avatar
    It won't unless you've made the drive bootable. Take a look at the iMore Blog article via the following link, if you haven't already.

    How to make a bootable Yosemite installer drive | iMore
    Last edited by Just_Me_D; 03-13-2015 at 12:34 PM.
    03-13-2015 08:46 AM
  3. warcraftWidow's Avatar
    Is your external backup via time machine or a third party app like SuperDuper or Carbon Copy Cloner? The latter two have options to make bootable backups. Time Machine backups are not bootable.
    03-13-2015 11:12 AM
  4. Mac Techie's Avatar
    Hold command-r when booting to see bootable drives
    03-13-2015 07:40 PM

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