Open the Terminal application on Mac OS located in / Applications / Utilities /.Insert a USB flash drive into your Mac, rename the drive to HighSierra for easy identification – remember to format and remove the USB drive to become a High Sierra installer.Check that “Install macOS 10.13 Beta.app” is in the Mac Applications folder, here by default download. ![]() Creating a MacOS High Sierra Beta USB Drive This guide explains how to create a macOS 10.13 Beta installer with the current developer beta, but the same principles apply to public beta when it is also available. ![]()
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