At least 36GB of available storage on the computer you wish to install the OS on. A downloaded installation file for whichever MacOS (of the ones listed above) you’d like.ģ. In order to create a bootable installer, there are three things you must possess:ġ.A USB external drive that can plug into the Mac device you need it to, and contains at least 16GB of available storage, though in this case more is better.Ģ. What you need to create a bootable USB for Mac You can run an OS installer like Windows, OSX, Mac, or specific versions of Linux from a bootable USB drive.įor Mac specifically, you can use a bootable USB to install MacOS Monterey, MacOS Big Sur, Catalina, Mojave, High Sierra, or El Capitan. Whether a computer is brand new or becomes unusable from a compromised OS, you can use a bootable USB to install an operating system. That being said, many new Mac laptops don’t have USB-A ports, so it’s a good idea to obtain an external port that connects to a USB-C (USB Type C) port to really make the process easy-ish.Ī bootable USB is a flash drive that allows you to both install an operating system (OS), and boot the computer from the external USB drive instead of the computer’s hard drive. The good news is there’s an easy(ish) workaround!īy booting from an external drive, like a USB for example, you can diagnose certain issues by accessing the internal drive with minimal effort. Every computer may not boot up every once in a while, which can be irritating because it prevents you from getting into the system to view exactly what the problem is.

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