Boot mac laptop from usb

Booting from an external storage allows you to start up your Mac in another version or copy of OS X, troubleshoot certain issues and more.


  • How to Boot a MacBook Air From a USB External Drive.
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  • How to start up your Mac from a bootable CD/DVD, USB thumb drive or external storage device.
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Step 1: Step 2: Press and hold the C key on your keyboard immediately upon hearing the startup chime. You can also press the left mouse button on a wired mouse during the startup in order to open the disc tray. Release the key after Startup Manager appears. Step 3: Highlight the volume you want to use by using your mouse or trackpad, or left and right arrow keys on the keyboard.

How to start up your Mac from a bootable CD/DVD

Step 4: Double-click or press the Return key to boot your Mac from the selected volume. If there are several USB storage devices connected to your Mac, Startup Manager will only list the ones containing bootable volumes. Full tutorial: Now click the Startup Disk pane.

Emergency Mac OS Boot Device Using a USB Flash Drive

You will be presented with various disk icons. Click the Apple logo and select "Restart.

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Click "Restart" to confirm you want to reboot your computer. Hold down the "Option" key until you see the Startup Manager. Press the Enter key to boot from the USB drive.

Create an Emergency Mac OS Boot Device Using a USB Flash Drive

Your Mac can lock up or suffer from other malfunctions if you do. References 4 Apple Support: Startup Manager: How to Select a Startup Volume. About the Author Andrew McClain has been writing since Accessed 19 February McClain, Andrew. Small Business - Chron.


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