I don't know how to use a Bootable Flash Drive
Why make a bootable flash drive? Once made how do you use a bootable flash drive? Can it be used to clear a SCREEN FREEZE or other problems?😕
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It is used to boot the computer, use Disk Utility, and/or reinstall macOS. Insert the drive into any USB port and restart the computer. Press and hold down the OPTION key until the Apple logo appears with a progress indicator. Wait until the Utility Menu appears.