Most recent firmware update prevents computer from booting

Discussion in 'MacBook Pro' started by ezsober, Feb 24, 2010.

  1. macrumors member

    Aug 14, 2003
    Hi. I recently attempted to install the most recent firmware and security updates for mac os x 10.5.8 on my macbook pro 17 inch (purchased about 14 months ago). Computer asked me to reboot, i did, it then gave me instructions for firmware updates. The screen went dark, and it did its thing, and I returned 10 minutes later. The computer had not rebooted.

    I pressed the startup key and it gave a long beep. Screen remained dark. Some minutes later it ran the boot cycle, but booted into windows (i have dual boot set up). I can only get into windows now.

    What is going on?

    Thanks for any suggestions.
  2. macrumors 68040


    Feb 24, 2009
    Toronto, Ontario
    Boot off your install DVD and from there you'll have a clearer picture on what's going on with the OS X partition.
  3. macrumors regular

    Feb 24, 2010
    Hold down the ALT-key when you boot to select bootdevice. OS X and Windows should show up there any other bootable device that is connected

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