When you use Startup Disk preferences to set Mac boot from an external drive, so it’ll boot from that disk until you choose a different one. Way 2: Set a Mac Boot from USB Drive using Startup Disk The machine will start to boot from the USB drive. Once selected, either hit the Return key or double-click your selection. Using either the pointer or arrow keys on the keyboard, select the USB drive you wish to boot from. The utility will look for any available drives that include bootable content.Ĥ. Once the Startup Manager screen appears, release the Option key. Holding that key gives you access to OS X’s Startup Manager. Press and hold the Option key immediately after you see the Apple logo. Turn on your Mac (or Restart your Mac if it’s already on).ģ. Insert the USB boot media into a USB slot.Ģ. Use the following steps, you can easily set Mac boot from an external drive in Startup Manager, so it’ll only boot from USB that one time.ġ.
Getting your Mac to load from a USB drive is fairly straightforward. Way 1: Boot Mac from USB flash drive using Startup Manager
#How to reimage mac from usb how to
Let’s see how to boot a Mac from a bootable USB drive and what to do if your Mac doesn’t start up from it.
#How to reimage mac from usb install
For example, if you install macOS or Microsoft Windows on a USB drive, your Mac can recognize that drive as a startup disk. By default, Mac starts from its built-in hard disk, but a startup disk can be any storage device that contains bootable contents that compatible with your Mac.
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