By default, your Mac starts up from its built-in hard disk, but a startup disk can be any storage device that contains an operating system compatible with your Mac.
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When you use Startup Disk preferences to select a startup disk, your Mac starts up from that disk until you choose a different one. Check for these possibilities if you can't see your disk in Startup Disk preferences or Startup Manager, or your Mac won't start up from it. These settings determine whether your Mac can start up from another disk. On Mac models from early or earlier, you can disable this security feature to load Option ROM firmware automatically.
This removes an important protection against potential unauthorized access to your Mac by other people with physical access to it. If you want to remove this additional protection but keep your firmware password:. Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement.
How to Change the Macbook Boot Order | orahehunumen.tk
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How to fix common Mac startup problems [MacRx]
How to select a different startup disk If you have another startup disk with a compatible operating system, your Mac can start up from that disk instead of your current startup disk. Use Startup Disk preferences When you use Startup Disk preferences to select a startup disk, your Mac starts up from that disk until you choose a different one. Select your startup disk, then restart your Mac. To leave Safe Mode, just reboot your Mac without holding the Shift key. To leave this mode, type reboot at the prompt and press Enter.
If your Mac is freezing, especially during the boot process, the messages here can help you identify and get help with the problem. If everything goes properly, your Mac will boot to its normal desktop. Recovery Mode provides various graphical tools for working with your Mac. You can then choose your language and use the graphical tools here. One of the nice things about a Mac is that this is all built-in.
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