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64GB Bootable USB Drive for MacOS, Monterey, Mojave, Sierra, Big Sur, High Sierra, El Capitan, Catalina. Full Install/Upgrade/Downgrade/Reinstall Mac OS X
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64GB Bootable USB Drive, will install: Monterey, Mojave, Sierra, Big Sur, High Sierra, El Capitan or Catalina. to your Mac. No internet is required. See image (4) for Mac Hardware Requirements, to ensure your MAC can do the installation. (1) Shut down your Mac with the USB drive inserted. (2) Hold the Option key down as you Power ON your Mac. (Keep holding the Option key down for 5-10 seconds. (3) Select the USB drive from the Startup Manager, it will boot and install the new operating system that you have you selected.
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