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Once complete, eject the USB you can reinstall macOS, should.
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mac catalina installer download
Once complete, eject the USB you can reinstall macOS, should.
Check the format of your storage device A Mac startup disk requires either of these file system formats. Use Terminal to create the bootable installer. Therefore your first step after downloading the installer should be to cancel the install. You can use a USB flash drive or other secondary volume as a startup disk from which to install the Mac operating system.
