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Name the drive ' Untitled' this name will be changed when the new volume is initialised. The drive must be formatted as a Mac OS Extended (Journaled) volume with a GUID Partition Table.

This can be a hard drive, an SSD, or a USB stick. You need a Mac-formatted drive big enough to hold the installer and its data - 12 GiB. Then copy the installer App somewhere else so that you won't have to download it again.Īt the command line, spaces must be escaped so these become: Therefore your first step after downloading the installer should be to cancel the install.

If you run the macOS installer from the /Applications folder, the installer app will be deleted. MacOS is distributed through the App Store which will download an installer app to the /Applications folder. Use a USB flash drive (or other removable media) as a startup disk from which to install macOS.