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How to use createinstallmedia MacOS

by puercaeli puercaeli 2020. 2. 16.

Since Mac Os 10.9 (Mavericks) , Mac os installers support createinstall command to easily (ish) create bootable usb media version of corresponding mac os installation file.

Corresponding article from Apple can be found here - https://support.apple.com/en-au/HT201372

 

How to create a bootable installer for macOS

You can use an external drive or secondary volume as a startup disk from which to install the Mac operating system.

support.apple.com

Despite following above apple article I could not make it work, I eventually figured out that you need to specificy installer location if i'ts not in usual location being Application folder.

So two points

1. Use sudo

2. you need to specify both volume being converted to usb bootable installer AND path of the installer

 

Usage: createinstallmedia --volume <path to volume to convert> --applicationpath <path to Install OS X Mavericks.app> [--force]

*You can drag and drop the file/volume directly

Arguments--volume, A path to a volume that can be unmounted and erased to create the install media.

--applicationpath, A path to copy of the OS installer application to create the bootable media from.

--nointeraction, Erase the disk pointed to by volume without prompting for confirmation.

Example: createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install OS X Mavericks.app

 

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