No restart from Startup disk

Discussion in 'iMac' started by NCMau, Jul 7, 2015.

  1. NCMau macrumors newbie

    Mar 6, 2008
    iMac 2015, Yosemite 10.10.3. On restart, the computer does not load the system. It tries but it goes on forever. The only way the system loads is when I keep the option key and select the disk. The other disk available is Snow Leopard which is installed in an external hard drive. The system appears confused. I did use the disk repair. Any suggestions?
  2. DeltaMac macrumors G3


    Jul 30, 2003
    When you are booted to the internal drive (whatever method you need to do that is fine!), go to your System Preferences, then Startup Disk. Make sure that your internal boot drive is selected. Click on the icon once to be sure about that.

    That should take care of your boot issue.

    If your iMac is a 2015 model, as you suggested, then it doesn't matter if the external drive has Snow Leopard as a boot system - your iMac can't boot with Snow Leopard. But - selecting the correct boot drive in Startup Disk will mean that your iMac will not look for boot drives, and go straight to the internal drive, if you have that one selected.

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