Choose which drive to boot from on a mac

Then t o change the BIOS boot sequence :. In the future, your computer will first check the USB port for boot media when starting up. Then the system will launch from that device every time. Regardless of the operating system you are using, booting your machine from USB media does not need to be difficult.

A general understanding how your system loads can provide the basics needed to understand what is going on when you use boot media. It provides guidance that is specific to the iteration of OS X you are running i. Sierra, High Sierra, Yosemite, etc.

Windows and Linux users might consider Acronis Disk Director 12 , which includes an intuitive Boot Media Builder that streamlines the process and offers tremendous flexibility for the type and kind of boot media you can create, including WinPE media. All rights reserved. Acronis Disk Director Learn more day free trial. When you hear the startup chime, press and hold the Option key. Powered by voicemail greetings for work examples. Saturday, November 13, Archived Post. Archived Post Dennis Sellers December 26, 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. Important: If you have a Mac with an Apple T2 chip, added security features may need to be set in order to change the startup disk.

See What is the Startup Security Utility? With your Mac or Mac with Apple silicon turned off:. When you see the available startup disks, select one, then click the Up arrow on Mac or Continue button on Mac with Apple silicon.