Create a bootable installer for macOS - Apple SupportCreate a bootable installer for macOS You can use a USB flash drive or other secondary volume as a startup disk from which to install the Mac operating system. These advanced steps are primarily for system administrators and other experienced users who are familiar with entering commands in Terminal. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful if y
ちゃらんぽらん : iTunes のイコライザ
