The user should check to see what size of ports they have on the Mac.The user should scan the flash drive with some reputable Anti-Virus software.The USB should contain 16-32GB of free space.The user should buy a name-brand flash drive.To ensure a risk-free procedure certain measure should be taken: By installing older versions through USB, it permits certain Apps to run which are not compatible with the latest macOS.Allows risk-free testing of the Beta version.It allows the user to test a new version before you decide to upgrade.Allows the user to install a different version of macOS.Here are the top reasons why the user should choose to Boot Mac from USB: It also helps to repair the Mac disk with Disk Utility and other tools. It provides the user access to the contents of the internal drive, assuming the data is safe and not corrupted. Using an external source like the USB drive helps the user get around the problem.
The likeliest of the reason for choosing the boot from the USB method is that your Mac won't start which denies the user access to the computer.
