9 Replies Latest reply: Mar 25, 2012 1:30 PM by jsd2
JeffCMKRNL Level 1 Level 1

Hello,

I just bought new Mac Mini with Lion.

I have an external optical drive connected via Firewire.

I can mount bootable disks on optical drive, to see contentents just fine.

 

I have bootable volume in drive which is readable, but restarting with "C" key held down does not boot off of optical drive.

Holding option key down while rebooting shows local HD plus a bootable partition I have on another external firewire HD, but it does not show bootable Optical volumes on Firewire External optical media.

 

Why can't I boot from optical media.

 

Jeff


Dual PowerMAC G5, G5 Mac Mini, CoreDuo MacBook, Mac OS X (10.6.3), If only Mac were based on VMS instead of mach kernel
Solved by JeffCMKRNL on Mar 25, 2012 11:48 AM Solved

Thank you. I was able to make a bootable USB flash of my Coriolis CD, but that is a workaround to my problem.

Why cant I boot from a bootable CD?

Reply by Tony T1 on Oct 16, 2011 12:46 PM Helpful

Try burning the Coriollis CD to a  USB stick, and then boot from the USB:

  1. In Disk Utility, select the the Coriollis CD  in the sidebar, then click the Restore button in the main part of the window.
  2. Drag the the Coriollis CD  icon into the Source field on the right.
  3. Connect to your Mac the flash drive you want to use for your bootable Coriollis USB. The USB drive must be formatted with a GUID partition map.
  4. In Disk Utility, find this destination drive in the sidebar and then drag it into the Destination field on the right.
  5. Click Restore.
Reply by jsd2 on Mar 25, 2012 1:30 PM Helpful

I have an external optical drive connected via Firewire.

My understanding is that some brands of external FireWire optical drives are not capable of booting a Mac, even though they can read and burn discs normally. You might try to get further info on your particular model.

All replies

  • TheSmokeMonster Level 4 Level 4

    why are you trying to boot from the CD?

     

    to reinstall lion or get in the recovery partition hold CMD-R while rebooting.

  • JeffCMKRNL Level 1 Level 1

    It is not a Lion CD, nor am I trying to recover.

    I am trying to boot from a Coriollis iPartition CD.

    I need to partition my one existing 493 GB boot partition to a 120 GB Boot partition and a 370 GB data partition.

  • JeffCMKRNL Level 1 Level 1

    Additional information:

     

    I also tred going to the System Preferences -> Startup Disk.

    My mounted Bootable CD ROM (Coriollis Bootable iPartition disk) was not listed.

  • Tony T1 Level 6 Level 6
    expertise.macosx
    Mac OS X

    JeffCMKRNL wrote:

    I need to partition my one existing 493 GB boot partition to a 120 GB Boot partition and a 370 GB data partition.

     

    Can't Disk Utility do this for you?

  • JeffCMKRNL Level 1 Level 1

    The disk utility can't do this without loosing all the data on my boot partition.

    iPartition can shrink and split an existing partition as long as there is sufficient free space.

  • Tony T1 Level 6 Level 6
    expertise.macosx
    Mac OS X

    JeffCMKRNL wrote:

     

    The disk utility can't do this without loosing all the data on my boot partition.

     

    Then you need to partition a MBR, correct? 

  • Tony T1 Level 6 Level 6
    expertise.macosx
    Mac OS X

    Try burning the Coriollis CD to a  USB stick, and then boot from the USB:

    1. In Disk Utility, select the the Coriollis CD  in the sidebar, then click the Restore button in the main part of the window.
    2. Drag the the Coriollis CD  icon into the Source field on the right.
    3. Connect to your Mac the flash drive you want to use for your bootable Coriollis USB. The USB drive must be formatted with a GUID partition map.
    4. In Disk Utility, find this destination drive in the sidebar and then drag it into the Destination field on the right.
    5. Click Restore.
  • JeffCMKRNL Level 1 Level 1

    Thank you. I was able to make a bootable USB flash of my Coriolis CD, but that is a workaround to my problem.

    Why cant I boot from a bootable CD?

  • jsd2 Level 5 Level 5

    I have an external optical drive connected via Firewire.

    My understanding is that some brands of external FireWire optical drives are not capable of booting a Mac, even though they can read and burn discs normally. You might try to get further info on your particular model.