

You should create an emergency Mac OS boot device any time you are going to be working on your computer’s hard drive or installing a new version of the operating system.

In What Instances Do I Need To Create An Emergency Mac OS Boot Device? In short, USB flash drives are easy to use and very convenient at the same time.
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Finally, most modern computers have USB ports, so you will not need any special adapters or cables to use a flash drive. First, flash drives are small and easy to carry around with you. There are several reasons why you might want to use a USB flash drive to create an emergency Mac OS boot device. RELATED : How To Add A Folder To The Favorites In Mac Finder: A Step-by-Step Guide Why Use A USB Flash Drive?
