The other is macOS dmg file, which is made by third-party developers or system administrators.
One is the official macOS installation app, which is only available from Mac App Store.
Reinstall macOS on Mac from Bootable Installerīefore getting started, you should know there is only two types of installation media for macOS. Create a Bootable Installer for macOS on Windows PC
Create a Bootable Installer for macOS on Mac
