Macbooks only boot from Option

Discussion in 'macOS' started by bronxtech, Oct 12, 2009.

  1. bronxtech macrumors newbie

    Oct 12, 2009
    I recently got a new unibody Macbook from work. Unfortunately, it has a smaller hard drive than my old white Macbook. Since most of the hardware is the same, I thought it might work if I just switch the drives. It does, and system profiler even detects all the right hardware on both computers. However, I can't do a normal reboot. If I try to start up normally, I get a black screen that says "No bootable device. Insert boot disk and press F1" on the unibody machine and a flashing disk with a question mark on the white macbook (which has updated firmware). However, if I hold down Option on startup, my hard drive comes up without a problem and I can continue to boot, select operating system, all as normal.

    This really gets in the way when installing new software, is a minor annoyance for obvious reasons. Anyone have an idea how to fix it?
  2. Richard1028 macrumors 68000

    Jan 8, 2009
    You need to set the default startup disk. (System preferences).
  3. bronxtech thread starter macrumors newbie

    Oct 12, 2009
    That works!

    Thanks for making me feel simultaneously dumb and happy.
  4. borcanm macrumors regular

    Nov 4, 2008
    Go to System Preferences ->Startup disk -> select your HD and click restart.
  5. Richard1028 macrumors 68000

    Jan 8, 2009
    You aren't dumb. I tried photoshopping a speck off my monitor once. :D

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