Create a bootable installer for macOS - Apple Support

Create 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

[a2ikm]

`$ softwareupdate --fetch-full-installer`でOSのインストーラをダウンロードできる。App Store経由だとダウンロードできないことがあるので要注意。あとFind myから対象のデバイスを削除すること。でないと-1008Fで詰まる。

[theatrical]

今日か明日やる