Startup mac from usb flash drive

How to Boot a MacBook Air From a USB External Drive

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.

Getting your Mac to load from a USB drive is fairly straightforward. Step 3: Press and hold the Option key immediately after you see the Apple logo. Once the Startup Manager screen appears, release the Option key. The utility will look for any available drives that include bootable content. Step 4: Using either the pointer or arrow keys on the keyboard, select the USB drive you wish to boot from.

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Once selected, either hit the Return key or double-click your selection. The machine will start to boot from the USB drive.

Why Boot macOS From USB?

Here is how:. If the installer auto launches, press Command-Q on your keyboard to quit the app. It has been updated to support High Sierra.

Use Startup Manager

This article covers: Why is USB boot media needed; How to start a Mac using USB boot Getting your Mac to load from a USB drive is fairly straightforward. If your USB thumb drive, USB-based external disk or flash storage contains a Full tutorial: how to pick a startup disk for your Mac at boot time.

It now does. Download Install Disk Creator by clicking on the link above.

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When the download is done, you can move it over to your Applications folder. Then follow these steps to create your bootable macOS High Sierra drive. Get the Apple Watch Series 3 at Walmart for the lowest prices ever.

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Macworld also has bootable-install-drive instructions for: Mojave macOS Apple You can read the information to learn more about High Sierra. Apple Once the download is complete, the installer will launch automatically. Connect your drive to your Mac. The app will reformat it.

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Launch Install Disk Creator. After you do this, the app will take a few minutes to create the boot drive.